No DOMS with P90X

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OK guys, I don't know what's up but I am never sore following P90X workouts. I do my own recovery drink of Whey Protein and a banana but I don't know how that can alleviate all muscle soreness. I am burning between 350 and 530 calories per workout and am working out very hard. I am trying to really concentrate on the muscle contraction at the bottom and top of the movements. Could it be because the workout exercises are too similar...for instance on Chest and Back.....pull ups; push ups; pull ups; push ups???? I love DOMS and feeling like I really worked hard...........any suggestions? TIA:happy: