GM, I have never heard that assertion regarding the Cheng Man Ching form....perhaps it is my limitation of knowledge, but I do not see that at all when examining the forms together.
I must partially take back my statement. Upon further review the CMC form appears to be composed of a kind of condensation of the long form: I have noted the parrallels below. It appears that a lot of the connective structure has been removed.
The first list is CMC's 37 the second and third are excerpts from different translations of the long form.
Chen Man Ching 37
kinda like the first section?
Preparation
Beginning
Left Ward-Off
Right Ward-Off
Roll Back, Press, and Push
Turn the Body and Lower the Hands
Single Whip
Lift Hands
Shoulder Strike
White Crane Spreads Its Wings
Brush Knee, Twist Step
Strum the Lute
Brush Knee, Twist Step
Step Forward, Move, Parry, and Punch
Apparent Close-Up
Cross Hands
pieces of the second section
Embrace Tiger, Return to Mountain
Ward-Off, Roll Back, Press, and Push
Turn the Body and Lower the Hands
Diagonal Single Whip
Fist Under Elbow
Step Back to Repulse the Monkey
Diagonal Flying
Cloud Hands
parts of the third section
Descending Single Whip
Golden Rooster Stands on One Leg
Right Toe Kick
Left Toe Kick
Turn Body, Heel Kick
Brush Knee, Twist Step
Step Forward and Plant a Punch
Step Forward to Right Ward-Off
Roll Back, Press, and Push
Turn the Body and Lower the Hands
Single Whip
Fair Lady Works Shuttles
Left Ward-Off
Right Ward-Off, Roll Back, Press, and Push
Turn the Body and Lower the Hands
Descending Single Whip
Step Up to Seven Stars
Step Back to Ride the Tiger
Turn Body, Lotus Kick
Draw a Bow to Shoot the Tiger
Step Forward, Move, Parry, and Punch
Apparent Close-Up
Cross Hands
Close T'ai Chi
Two Versions of the last two sections of the Long Form (YCF 108):
56 Tiger Returns to Mountain
57 Grasping Sparrows Tail
58 Horizontal Single Whip
59 Part Horses Mane Right
60 Part Horses Mane Left
61 Part Horses Mane Right
62 Ward Off Left
63 Grasping Sparrows Tail
64 Single Whip
65 Fair Lady Left
66 Fair Lady Right
67 Fair Lady Left
68 Fair Lady Right
69 Ward Off Left
70 Grasping Sparrows Tail
71 Single Whip
72 Wave Hands Like Clouds
73 Single Whip
74 Snake Creeps Down
75 Golden Cock Left
76 Golden Cock Right
77 Repulse Monkey Right
78 Repulse Monkey Left
79 Repulse Monkey Right
80 Diagonal Slant Flying
81 Raise Hands, Shoulder
82 White Crane
83 Brush Left Knee
84 Needle at Sea Bottom
85 Fan Through Back
86 White Snake Darts Tongue
87 Parry Punch
88 Ward Off Right
89 Grasp Sparrows Tail
90 Single Whip
91 Wave Hands Like Clouds
92 Single Whip
93 High Pat on Horse
94 Plain Crossed Hands
95 Turn and Cross Kick
96 Step up, Punch Crotch
97 Ward Off Right
98 Grasp Sparrows Tail
99 Single Whip
100 Snake Creeps Down
101 Seven Stars
102 Step Back to Tiger
103 Lotus Kick
104 Draw Bow Shoot Tiger
105 Deflect Parry Punch
106 Apparent Withdraw. Push
107 Cross Hands
108 Conclusion
Transition Form (Guo Du Shi)
64. Wardoff, Rollback, Press, and Push Forward (Peng, Lu, Ji, An)
65. Single Whip (Dan Bian)
66. The Wild Horse Parts Its Mane: Right (You Ye Ma Fen Zong)
67. The Wild Horse Parts Its Mane: Left (Zuo Ye Ma Fen Zong)
68. The Wild Horse Parts Its Mane: Right (You Ye Ma Fen Zong)
69. Grasp the Sparrow's Tail: Left (Zuo Lan Que Wei)
70. Wardoff, Rollback, Press, and Push Forward (Peng, Lu, Ji, An)
71. Single Whip (Dan Bian)
72. Fair Lady Weaves with Shuttle: Left (Zuo Yu Nu Chuan Suo)
73. Fair Lady Weaves with Shuttle: Right (You Yu Nu Chuan Suo)
74. Fair Lady Weaves with Shuttle: Left (Zuo Yu Nu Chuan Suo)
75. Fair Lady Weaves with Shuttle: Right (You Yu Nu Chuan Suo)
76. Grasp the Sparrow's Tail: Left (Zuo Lan Que Wei)
77. Wardoff, Rollback, Press, and Push Forward (Peng, Lu, Ji, An)
78. Single Whip (Dan Bian)
79. Wave Hands in the Clouds: Right (You Yun Shou)
80. Single Whip (Dan Bian)
81. Snake Creeps Down (She Shen Xia Shi)
82. Golden Rooster Stands on One Leg: Right (You Jin Ji Du Li)
83. Golden Rooster Stands on One Leg: Left (Zuo Jin Ji Du Li)
84. Step Back and Repulse the Monkey: Left (Zuo Dao Nian Hou)
85. Diagonal Flying (Xie Fei Shi)
86. Lift Hands to the Up Posture (Ti Shou Shang Shi)
87. White Crane Spreads Its Wings (Bai He Liang Chi)
88. Brush Knee and Step Forward: Left (Zuo Lou Xi Yao Bu)
89. Pick Up the Needle from the Sea Bottom (Hai Di Lao Zhen)
90. Fan Back (Shan Tong Bei)
91. White Snake Turns Its Body and Spits Poison (Zhuan Shen Bai She Tu Xin)
92. Step Forward, Deflect Downward, Parry and Punch (Jin Bu Ban Lan Chui)
93. Step Forward, Wardoff, Rollback, Press, and Push Forward (Shang Bu, Peng, Lu, Ji, An)
94. Single Whip (Dan Bian)
95. Wave Hands in the Clouds: Right (You Yun Shou)
96. Single Whip (Dan Bian)
97. Stand High to Search Out the Horse (Gao Tan Ma)
98. Cross Hands (Shi Zi Shou)
99. Turn and Kick (Zhuan Shen Shi Zi Tui)
100. Brush Knee and Punch Down (Lou Xi Zhi Dang Chui)
101. Step Forward, Wardoff, Rollback, Press, and Push Forward (Shang Bu, Peng, Lu, Ji, An)
102. Single Whip (Dan Bian)
103. Snake Creeps Down (She Shen Xia Shi)
104. Step Forward to the Seven Stars (Shang Bu Qi Xing)
105. Step Back and Ride the Tiger (Tui Bu Kua Hu)
106. Turn the Body and Sweep the Lotus with the Leg (Zhuan Shen Bai Lian)
107. Draw the Bow and Shoot the Tiger (Wan Gong She Hu)
108. Twist the Body and Circle the Fist (Pie Shen Chui)
109. Step Forward, Deflect Downward, Parry and Punch (Jin Bu Ban Lan Chui)
110. Seal Tightly (Ru Feng Si Bi)
111. Embrace the Tiger and Return to the Mountain (Bao Hu Gui Shan)
112. Close Taiji (He Taiji)
113. Return to Original Stance (Taiji Huan Yuan)