From my recent experience, made it back to 2P about 4 weeks ago (hallelujuah ), it took about 2.5 days to post the corrected (as the B-fare additional EQM miles is why I made it in one trip), as soon as those posted it said Premier on the account.

It took less than 24 hours to get the regular amount of EQM to post, then another day for the bonus EQM... so if you're flight gives you enough EQM to get to 2P w/o any bonuses etc.. should be closer to 2 days rather than 7 from my experience.