The Hoosier TD*S tire is slightly faster than the older compound. They also seem to last through more heat cycles than the Goodyear Blue Streaks and cost 20% less. They are great for practice or qualifying but in an actual race in a big bore car, they will start overheating after 4 laps and by lap 6 they are 3 seconds slower.
As usual, I called up Bob Woodman and ordered my Blue Streaks for the Atlanta historics last year. The tire salesman told me about the "new" T.D's that were "just as good" as the Goodyears and $20./a tire less. I drank the Kool-aid and ordered a set.
First two laps were great. Sticky, predictable, could throw the car any where and recover easily. Then started getting rear wheel hop under braking and having to brake way early. Had to take a more conservative line because the "new" T.D's were acting exactly like the old T.D's. Was off a couple of seconds a lap that race.
At the end of the race I had my old G.Y's re-mounted and lap times picked back up.