Yes, that would have been a better question to ask, how many cycles could be gained, since frame rate is so dependent on the game... I was too tired to think of that. Would 1500 cycles be 1.5mhz or 15mhz or... something else?
I dont know if it's really comparable to MHZ, it's basically how many instructions DosBox should attempt. I believe Daggerfall on my PC uses around 15000-20000 cycles. I don't know the exact number because I use a CVS build with timesynch.