When does an agent call you back after a showcase?

Okay so on a friday i did a monologue showcase and I rocked it. I got the most laughs than anyone and it went almost perfectly:) (dont mean to brag im just proud lol). Anyway soooo my question is how long does it take for a talent agent to email you back for representation? ( I didnt give them my number) About 7 to 10 agents came, and it was on friday and now its sunday evening. When will they respond back? and what are my chances good for even getting a callback? answers much appreciated!