Hi Silvercamper and welcome to the Forums!
It's difficult to say what's normal and what's not without actually visiting your trailer while you're set up. There will be some vibration transmitted through the trailer, but it should be minimal, particularly if your stabilizing jacks are properly deployed.
Next time you're out and about, go to your nearest Airstream dealer and check out other new trailers and see how they are compared to yours. If you can make it to any rallies, that would also be a good opportunity to see how other folks' trailers feel in comparison with yours. Then you'll have something to judge yours against.
On edit... I see that Terry beat me to posting!
AIR 2053 Current: 2006 Born Free 32 RQ Kodiak Chassis, & 1995 Coachmen B-van
Former Airstreams: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' Two-door, 1994 B190 "B-Van"