Soloreaper
remember we are talking about KPs! Some areas now have 3! The message above this sounds like it was done pre-KP.
I remember hearing that Underspring had 7. That sounded high to me, until I personally observed SC having more than 3. If I were to guess, I'd say 3 for the north and 3 for the south. The KP in US seem to have a slightly bigger range than the other ones. That's a free tip.
LOTS of other people were able to level their PR dig to q250 during the KP times. It's not impossible -- in fact, it's quite easy if you know where to go and aren't stupid. Figure out what they did, and do the same.
Edit: PR isn't like digging in Void. Maybe I have a slightly different definition of "easy" given that I dug my first 250 in Loria, and loved it there. Void is the exception, not the rule.