Hard turning t-bar adjusters isn't that unusual. Having one that turns easy is probably more uncommon. I broke one of the adjuster bolts on my truck when I cranked the torsion bars. Lucky for me I was thinking ahead enough to have the frame on blocks while I broke them loose. I don't know how low it would have gone, but I don't think I would have wanted to be under the truck with the wrench when it let loose. I'm not that burly of a guy and I managed to snap it with just a 1/2" drive 24" breaker bar, so I imagine it was ready to break pretty much any time.

In short, if it turns easy or hard, count your blessings.