DY, the only problem is that “everyone” takes it personally. If you take too long to get back to the shadchan with a “yes” everyone’s ego gets out of whack. If you take a long time checking out prospects you should tell the shadchan “she is in middle of something at the moment I will get back to you if she becomes available”. In that way the boy that says yes and his family have no idea that you are taking 2 weeks to check them out. Of course you are risking the opportunity that he won’t be available when you are ready, but you take that risk anyway when you take too long to give an answer.
Shidduchim is such a sensitive balancing act.