Is it too late to purchase a link on a PR site and get it indexed before the update so that it helps my PR?
A backlink can be counted very quickly, as little as one day. If Google has yet to take a snapshot of your site to determine PageRank, then that link could help your site when the next update rolls out in a few weeks.
Imo google takes a snapshot and we can see them as toolbar pr with update with a delay (from my experince 15-30 days) , I think you won't be able to catch this update but who knows
Well from my personal experience I got about 4-5 PR4-5 good backlinks about less than a month before the update for my blog but still received a PR0.
From my experience Google has taken the snapshot for this PR export. Only the links which are on Google Webmaster Tools right now will be counted in this PR calculation. But if you buy a long-term link it will be very useful for the next update.
google take time to check quality backlinks. this may not effect in this update, but next update may effect.
Google discounts and penalizes purchasing links to inflate PR and serp(s). So if you are going to purchase links for reasons besides traffic, I wouldn't post about it on DP with your sites right in your signature.
i think it is too late right now, getting backlinks. but you can get benefit for next update for sure
it's an unknown quiestion. it depents on the pr snapshot date. if pr snapshot date has passed, the link that you buy will effect on next update
if you are concern on PR, it's not kinda late but the earlier the better... but it will help you in SERPs...
It's never too late to buy high pr links on related sites Well it's to lait to get that "PR" (witch for me doesn't counts) but .... that link will help in RANKINGS witch is all that mathers