Taking that page, with 1962 precision, my critical chance should be 93,4% ???
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Don't forget that all level 80 characters have a base precision of 916 and base crit of 4%. So your increase in crit is (1962 - 916) / 21 which is 49.8, giving you your 54% crit chance.
I've noticed a queue for WvW several times during the stress test, but a lot less then during other beta weekends/stress tests. The number of players in the WvW zones didn't seem to be a lot more then during the other BWE's/stress tests.
Considering the stated HDD space requirement is 25 GB and the current size of the game files is around 16 GB I'd say that they still have a lot of higher level content that they have to add to the public client. They will also need to update any balance changes they make between now and release.