Actually, yes, I have experienced quite a few delays over the past months. I'm scratch building a Bearhawk so I buy lots of raw material (sheets of aluminum, 4130 tubing, hardware, etc) and have had many 1-4 week delays on simple things.
My current delay is about 6 weeks (hasn't shipped yet) for an AN490 threaded rod end. They had one in stock at the end of April...they are now saying mid-June for the other that I need.
All that being said, I find their customer service (especially Lynette) very helpful and responsive.