I used a Turnigy TrackStar 120A brushless short course truck ESC in combination with two 12x5 three blade beechwood propellers mounted back to back for the tail rotor on my 40ft hot air blimp. I did not notice any difference in thrust between forward and reverse. I did not measure the thrust though, so there still could have been less in reverse but I could not detect it by feel. I'm familiar with the problem you are referring to and it is indeed an annoying one because you have no way of knowing what you will get until you buy the ESC and try it. Since the RC car people probably don't have the need to travel full speed in reverse, it doesn't bother them.