How long does it usually take for backlinks to influence your SERP? Say I got a PR 7 and lots (50+) of PR0 today, when could I see a reflection in the SERPs? I know it may have to do with how long it takes for Google to find and index the page the backlink is on, but for example the PR 7 link; Google should crawl that quite quickly, especially if it's an old page, right? I want to know if this could have influenced my movement in the SERPs (from one day to another).
I wouldn't expect it to be too long Wouldn't Google suspect something fishy about 50 backlinks a day though?