You'd think after manually tearing out a kitchen's worth of cabinets, pulling up vinyl floor (post-asbestos) and scraping mastic off baseboard that I'd just solve the whole thing by measuring the subfloor...you'd think. Well, I just did & uh, oops, they weren't 1 X 8's at all. 1 X 10's more like. But actually, 1 X 9 1/2 -- so you're answer above is right. thanks for your answer; it was worth it to read a bit o' carpentry-history.