No wait.. Sorry I mean PR5 .. Although this is my sites first month in the index. I would think that next month I should be closer to a 6 and if I don't have it by next month then I should get before christmas.
Although I'll be much happier with a 5 than a 0.. ANY DAY
PR 5 here. Also, I am not sure I understand how a site ranking pr5 or pr6 would all of a sudden get pr2 or worse without linking to a bad neighborhood (or unless there is a glitch that affected count of backlinks or if they did something spammy). One thing that happened to me that almost cost me big time was that I discovered 3 outgoing links on the main page of my site that had pr0. When I added these they were pr5. I imagine that I caught them and removed them just in time before I got penalized. Since then, I check every outbound link to make sure they work and to make sure their pr is sufficient to stay listed on my site. I would bet that many people fail to periodically quality check their outbound links (especially sites with hundreds out outbound links) to make sure they remain top quality.
A bunch of fives. This is usually good enough for a top ten, even for competitive keywords, if you look afetr other variables as well. I can usually get to 5 within 2-3 months. Would like to get them to 6, though.