Yep, I noticed the same; when I've been watching I see that most seem to be doing 90 kts at 1800'... even most Bonanzas and Mooneys! I did see a King Air flying the high route; I kinda wonder why he didn't do the turbine/warbird arrival? Odd.I just looked the traffic going into OSH. The line was moving at ~ 100knots and most of the traffic was ~ 1600'.