The First Rule...
The first rule of writing like Chuck Palahnuik is to never talk about writing like Chuck Palahnuik.
Although, depending what writing sample I put in, I also get Gertrude Stein and P.G. Wodehouse, or Arthur C. Clarke.
At least it wasn't E.L. James.
The website, BTW is http://iwl.me.
Be warned, though. It's a TIME SUCK.
I amused myself quite a bit by putting in different snippets to see what would turn up.
Who do you write like? Share in the comments.