I don't pay much attention to them at all, for all the same reasons that I said I didn't think the system was of any use to potential downloaders.
There is no question that you are right. it feels good to see 4 or 5 stars on something that you have worked to make. But if one puts too much stock in them then all those things that were just as much work that go unrated can be discouraging. I actuallly place more value in comments. But that is just me personally. I figure if they come and look it is good, if they download and can use it is even better. :)