In general the models have been very accurate for storms that are fully developed this year, and in recent years; models are far less accurate for tropical waves and new tropical depressions.
One big problem is many of the popular "model" sites show many old, worthless models and omit the newer more accurate models.
Look at Rita though. Even after she came in, 3 were predicting a loop back into the Gulf and one back to the Atlantic. I agree though that as she got closer they started to converge. I'm just saying that people should look at them as what's going on right now and not to predict landfall by a model of choice while the storms are still way out to sea.