Billdozer- good example of another possibility. That reminds me of how my Infinite Theory is. It was a little over/under on Brunswick Anvilane but was absolutely a killer on US Bowling FastLane (the same synthetics used at the Kegel Training Center, the 2009 King of Bowling and in the Manufacturer's Cup the last 2 summers). That was without changing the ball surface.
Yes, there actually is a place around here that doesn't use AMF or Brunswick.
Sometimes it can be a combination of layout, lane surface and ball surfaces. Or just one of those.