Yes, the figures vary between variants. Best figures I can find (2012 DOT&E report) give the following for sustained G:
F-35A - 4.6
F-35B - 4.5
F-35C - 5
Note that the F-35C figure may be achieved at a lower speed than for the B and the A. (My error on sustained g in earlier post - sincere apologies).
Yowza. I did not realize the F-35 was so G limited. I knew it was not a 9G airplane, but not being able to pull even 6 or 7 G seems awfully restrictive. With such a limited G envelope, the fly by wire control laws must provide really
hard over G protection because an aggressive pilot would surely exceed those limits without it.