I was unclear too if it was per tyre company or per team...
But anyway there are obviously lots of avenue's of investigation for Toyota...
It does seem though that they are too conservative, they brought their car out early to ensure reliability....to finish 1st first you must finish etc etc...but they've obviously not gone far enough before launching and lets face it with so many other teams finishing the race they've had zero advantage though sticking with reliability.
I'm a Toyota man - I've loved both of my Supra's (MKIV's) I totally respect their car building...but like with their car production their F1 team is too reserved/conservative.