I ran the stock bp-10 pads in my wilwoods all season, and only had to change them before nationals. I had (i think) 18 races this year. I think the stock pad is GREAT on a big track, but on short tracks with a lot of braking, you will need a more aggressive pad.
On a side note, I wouldn't go back to the toyota brakes for any reason. The wilwood system performs great, is 15 lbs lighter, and is much easier to work on....