[donv]

My understanding of TC operation is that it doesn't affect the engine output at all - what it does is use the anti-lock system to apply the brakes to even out the car and stop the wheel spin/slip (therefore "fighting" against the engine in a way). I've triggered it in 3rd several times while being a bit too aggressive in fast cornering (dry pavement, on/off ramps), but never on a dry straight. It does feel like a loss of power when it comes on, but much more subtle than hitting the rev limiter.