Since the test was by Hoosier and to show how the new Hoosier is a better choice, I doubt that they put an effort in making it a fair test. They likely used new unshaved tires that had not had any heat cyckes yet to optimize tire performance, could have run the Toyo tires first when the track was cold, using too much or too little air pressure, unlikely that they tried to optimize the chassis setting for the Toyo. Conversely, they most likely rn the Hoosier tires when the track was warmer and after there was a little rubber on the track. They obviously tried several set up changes to arrive all the wway to 3.5 degrees of negative camber up front.
The only fair, unbiased test was performed by problem child as described here:http://www.apexspeed.com/forums/showthread.php?t=66371We did a back to back test with Toyo tires that were run for 17mins, then sat in an unheated/un AC WNY storage unit for 11 1/2 monthes, and a new set of stickers. No difference in time or driver feedback (once we got the glue, mold release, and nibs off). We subsequently mixed and matched with no negative issues, at times running tires together that were purchased over a range of 3 years. This was at lap record pace.
Any differences in grip seem to be short-term after relocating tires to different corners. It seems to take a few laps to rearrange the rubber pickup and wear pattern. While the Toyos may not be the best tire in the world, they are absolutely consistent, durable, and affordable