The only rp I'm really participating in right now is a private rp and I tend to write a bit, well, sucky in those.
I can write with detail though, really. I can't say I'm absolutely amazing at writing and often find myself staring at the page for hours in search of the correct words (The language barrier can be a bit tough from time to time, I'm Dutch.) , but I can write. I could even give you some examples from another site if you'd really want them.