There's a poster over on the Howardforums thread who says we're mostly seeing results of increased proxy server speed, rather than real network increases - he sure *sounds* like he knows what he's talking about, and it looks to me like the only test that's giving repeatable, reasonable results is the http://www.dslreports.mspeed test, which is specific to mobile...
at 190Kbps, it's showing an excellent, but realistic EDGE speed. I'd say that anything over about 210-215 with EDGE is seriously suspect, as the theoretical max is 236Kbps... under lab conditions.
Yea, I think anything over 200kbps is somewhat spurious. But still, 200kbps is a lot better than the 80kbps previously achieved on EDGE.