I'm not trying to be mean. My g/f kept complaining that she never got as many stations as I did. So i checked the antenna, and it was only halfway out. Made a huge difference. It's low-tech, so it may be possible you haven't yanked that puppy out far enough.
Having said that, I have no trouble with the antenna range, gets actually more stations than the deck in my truck. If it seems sub-par, take it back to the dealer...I haven't heard anyone else complain about the range.