Yes, I always get feedback on bids submitted. You spent a great deal of time and energy on your bid, and you deserve to know the outcome, and the reason for it. At the very least, you should call the GC after bidding has ended, and ask where you came in, whether high or low. Some will even tell you the exact bids submitted. Keep in mind that you are sometimes bidding against 30 other contractors for jobs, so that has something to do with it as well. In my opinion, if you are not getting feedback after a bid, you are selling yourself short.