Nope. You have open them up and change the frame rates individually.
Maybe there's a miracle script that will change the frame rates of selected comps, but I don't know about it.
There's an old script called rd_CompSetter. It allows you to lengthen your comp and all nested comps which are at or beyond the end of the comp at the same time, along with their frame rates. This only works for the selected comp and all nested comps within that selected comp.