The way we internalise a beat have a lot to do with the context of the music. Honestly its very rare that I hear 7/8 as a seven time bar (only if the pulse is slow, or if the harmony change every 7 beat or if a melodic cell that fill the bar entirely repeat for several bars). So actually I alomost always hear 7/8 as 3+2+2/8 or 2+3+2/8 ect... depending on the setting.