If traction is good, and the tires are soft (warm weather, new tires) it's not as easy to roast the tires. Even my Daytona won't do very much of a burnout since the weather has been 75+ degrees out. When I first installed mine in February, I could lay patches with ease. If you're doing a brakestand, you may feel ABS kicking in on the front tires. Don't forget - the rears are moving, so the car thinks that the front tires are locked up - so it pulses them. If you feel the brakes pulse on a back wheel, it's the BLD (Brake Lock Differential) system working - an electronic Posi that uses the ABS system to keep BOTH rear wheels spinning, not just one.
If you want to see your car really brake loose with NoESP, either find sealed blacktop (like a parking lot that was recently sealed) or wet pavement. I've found that those with the best burnoutability either have CAI/Catbacks/other mods, or live in cooler climates( and some are just plain lucky) Also, you can see that it's doing its job by doing a donut. Whith ESP 1/2 off, you can't. With ESP fully off, you can go nuts.
As for the difference between GSM's ESP mod and NoESP, they both work by doing the same thing: they cut power to the DSS (Dynamics) module. NoESP does it for you by tripping a relay. GSM makes you add a switch. If you're going to go that route then just do the RTJunkie mod for $5.00. As far as fan mods go, just search this forum for reviews on both...
Also keep this in mind: When the tires are new, they are softer, stickier, and of a larger diameter. All this makes them harder to brake loose. As they age, herden, and wear, you can brake them loose with ease.
... OK, I'm done. Any comments?