quite honestly, i would image so.. !!
it all depends on what ampage your Motors would like to draw from your ESC, thus in turn, how many Amps can the ESC draw out of your batteries.
as i use very low drain Motors (4 amps maximum drain under load) i could put two motors quite happily on a 10 Amp ESC, and would probably only need a 5 Amp switch, but to be on the safe side and have some reserves, i would opt for a 20 Amp ESC and a 10 Amp Switch.