Not that I know what I'm talking about, but skills work in whatever capacity they're used in. Of course if you're going to mainly pvp, you might want to get certain levels of skills and diversify a bit.
Yes you're right, pve can do just fine in pvp; but generally a pvp build will have the advantage if they met....unless it's a seasoned pvp'er, then it might be even =/
And sorry to repeat what Bdogg said, didn't occur to me until after I typed it ^^;