The fastest verified R/C car (electric or nitro) is Cliff Lett's AE L30, which hit a top speed of 111 MPH. His TC3 only managed 96 MPH. Here's a link:
http://www.rccaraction.com/rc/articles/need_speed.asp
And yes, electric kills Nitro in acceleration and if two-speed trannies were run like Nitros, electrics would kill a Nitro's top end.
BTW, RC Car Action will be hosting a "Fastest R/C Car" competition sometime after September 1st. It will certainly be interesting to see how fast the top car gets.