My cranks also spin freely. What I would add is that my XT cranks (also HT2) were noticeably quite stiff when they went on and now are much more free at the BB, 500 miles on.
Note too that Shimano offers no wannranty on BBs whatsoever. A friend of mine had his for only 5 days before it needed replacement; Shimano said, "sorry, there's nothing we can do" and he had to buy another.
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Matt
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