This is one point on which I actually agree, in part, with Richard Dawkins. I say "in part" because I don't believe this is a problem common to all of religion, but, unfortunately, I do see the tendency in many theists, when they are confronted with a difficult question, to simply bury their heads in the sand.
To be fair, though, many atheists do this, too. I don't think this is a quality that we derive from religion. I think it is just human nature, regardless of ideology. I've mentioned elsewhere that many who sit and listen to Dawkins are satisfied with answers that are not really answers, but here is another example...
Here's a summary of that exchange:
Audience Member: What if you're wrong?
Dawkins: Oh yeah? What if you're wrong?
I agree wholeheartedly with Dawkins. It is a big problem when we are encouraged to accept answers that are not really answers. This is includes a lot of mainstream Christianity and they're going to have to deal with this problem if they are to maintain some semblance of credibility or validity in an increasingly secular world. Unfortunately, this also includes Dawkins.