It does not, they rather wonder why they're not getting any response, since it could be anything from laziness to exactly what you said. Don't count on people being able to realize exactly why they're not getting any response, because it's really quite frustrating to not know such things.

In other words, please don't ignore people just because their app's are terrible. Tell them no, then they can decide whether to be pissy or to try harder. If you don't tell them anything, they're stuck waiting for an answer that won't come. That's not very nice, is it?