5 dollar 6 man super turbos play all day long. I never wait more then a couple mins. The 10 dollar super turbos are a little slower but still fill pretty quickly. I don't know that I've even seen 10 man ST's. I did see a couple 18 mans that seemed to be getting runners. I have been pretty impressed with RPM so far, all things considered.
Hope this helps, if even a little

GL