Depends on the plane you're using again as well. A nice beautiful 109. Or the spit16dweebers...from the runway to 15k on your 6 oclock in under 45 seconds.
Well, since I normally fly 109's and 190's, I wouldn't have a problem with climb in the first place. However, I find that most people who are stupid enough to HO you will just do a flat turn after the merge, bleeding off all of their energy, anyway.