There is a potential monkey wrench here. (well, aside from the US Congress saying "no thanks", which actually might not be the case they have been wanting PR to vote on their status)
There is a significant minority of people, less than the pro-statehood side, but still a significant minority, who wants to keep their current status as an unincorporated territory. Since they were cut out of question 2, most of them refused to vote on question 2. If you count the ballots that left the 2nd question blank, the pro-statehood vote was only 45%, which would be a plurality but not a majority.
If the congress wants an excuse to deny PR, they could point to that. Or, if they were looking for an excuse to admit PR as a state, they'll just ignore it and give them some kind of long several-year path like Alaska and Hawaii, where they need to do several things, probably including teaching more english in school.
<ptp> how many emo kids does it take to change a lightbulb?
<Willy> HOW MANY?!
<ptp> none they just sit in the dark and cry