Perhaps I am just more in tune with my car and how it feels.
That said, I am loosing the equivalent of 13.5 hp in my M2 tuned M235i (3.7% of 365 hp). And you get the 3.7% throughout the entire rev band. Back in the days of naturally aspirated engines guys would be all over such an increase in power.
Think of it like a 3.7% salary raise. Would you not take it if all you have to do is select the right option?
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[FONT="Arial"] M235i 6 speed, MGM. Wavetrac LSD with altered final drive ratio, MPE, MPK Airbox, side skirts, diffuser, Dinan springs, LCAs.