I had an agent request the full the day after i sent the query. The following week she sent it back with requested changes, which I made.
So now I'm waiting to hear back on that. One week so far.
Another agent rejected one manuscript, then emailed me the following month changing her mind.
so, who knows???????
They can email you telling you they really love it, dont' talk to anyone else, etc, and then take a long while to get back to you. but keep in mind what is a long time to us isn't necessarily a long time to them. :.) Although sometimes you'd think they'd move faster, right?
VERY SLOW BUSINESS......