Why 6/12 but no 5/10?

[trevor]

Was at the Soaring Eagle in Mt. Pleasant, MI this weekend playing 3/6 (they were god awful BTW, maybe a trip report in B&M later). I had contemplated playing 6/12 but didn't really have the roll. Here's my question: Why a 6/12 but no 5/10 game? I'm positive I read on 2+2 somewhere that the odd combo actually increases action, but I have no conclusive evidence. Anyone care to enlighten me?

Note: I was on a sweet run and won 2 hands in 3.5 hours against a bunch of 3rd graders. Yippie! [img]/images/graemlins/mad.gif[/img]