Spot on with what? Any given ICS feels like a toy as opposed to a weapon, and only performs equal to the all plastic Tokyo Marui. The only ICS i have been mildly impressed with is the MP5.
Out of the box, the average G&P is shooting at around 330-350, whereas an ICS will fire at around 275-300 even. Both velocities are modest, and will give you all that you need in a game, but obviously the G&P is geared just a little higher. Put .25's in each weapon, and the numbers drop in both weapons, yet fire longer and straighter of course.
**Don't pay attention to any brand that claims 400+ FPS out of the box for a shockingly low price. It will only bring you hardship, pain, blood sweat and tears and blah blah blah.**
My point is that ICS is too high priced for too little punch. For example, aside for they all feel like crap, most ICS gearbox assemblies are designed with 6mm bushings (and if my memory serves me correctly, they still use the proprietary split gearbox design, an esoteric format which never became the primary pick of airsofters, and for a reason).
Some CA and most all G&P gearboxes are made with 7mm bushings, this keeps the weapons running smoother, and allows them to safely run with higher figures. This is because the larger bushings are absorbing the shock over a larger area. It's science.