I'm with Paul, something had to be done wrong (i mean no disrespect to you ARed). those numbers are very lame, yet too consistant for that much wear (most of the time, not all the pots will wear evenly and so grossly).
i think of compression results like dyno runs - they are nice for tuning and relative comparison, but the absolute numbers are not all that useful.
some things to remember. motor should be warm. ignition disabled, Throttle should be cracked at WOT. all plugs out. battery charged.
if one checks compression on a colder motor, the numbers can be a good bit low.
Matt, a tester can be bought at a parts store for 20 bucks or so (i think). it should include complete instructions (though i hit some of the fine points above).
also, Ared, did you get wet numbers too? that would tell a bit more.
good luck.