I bought Toyos a wee while back, cant remember if they are t1-r or t1-s, whichever is the newer tyre i got.
The person who fitted them said " i take it since you are buying these you wont be driving slow so i've increased the pressure a bit"
I dont know if its that or just the tyre but they arent a patch on my Yokohamas, even after 20k miles the Yoke's still handled better.
I keep meaning to put the pressure back down but im a lazy git.
That and the fact that there has been 3 or 4 dry days in the 3 months i've had them means grip has never been great, the time summer weather comes they will be worn.