Yes, and Nader also didn't cost Gore NH. Heck, I would have been a Nader-Bush swing voter in 2000.
IIRC, Nader's own estimate after the fact was that 50% of his voters would vote Gore, 25% Bush, 25% not vote. If those numbers had held, Gore would've lost NH by about 3000 votes rather than 7000 votes IRL, sure.
That said, there's no reason to assume that number was accurate. Obviously, there were Nader supporters who would've gone to Bush, but I think that the number was significantly lower than a 2-1 ratio.