Yep, I love my T1-S's from Toyo. They are great - as a matter of fact I just put four on my Cobra. You have to try to spin them in first. With 300 lb-ft of torque that's a good thing.

Actually, I was going to post here about my experience at Pocono Raceway a couple of weeks ago but I never had the chance. In my run group there was Eric F with a Cougar on track rubber and a miata on track rubber and my T1-S's were very close to being comparable to the track rubber! All in all I've done two autox sessions and about an hour and a half on a road course and there's still plenty of tread left (after a couple thousand miles driving back and forth to work). I will NOT be changing my brand any time soon - my track rubber will be Toyo RA-1's or the new T1-R's or whatever they're going to be and I'm going to probably get Toyo snow tires, too.
Hope that helps and I KNOW you will not be disappointed if you get them. Shop around A LOT as the price is going up due to popularity. I got four 245/45/17's for $170 apiece.