sure, but text sig doesn't really separate post like a picture do.
I understand that you want a bit more flexibility for your sig and the various link you put there (like mine) but some people tend to put bazillion quote in there that makes reading a thread confusing
talking from experience from a forum where only text was ok as sig, so a 17px high picture was a bannable offense but 10 line of quote from a random movie was ok. I'm pointing the extreme maybe but that's was my point in the porevious post.