[jkarneges]

Here he mentions staying in contact with college friends for use as future co-founders: http://paulgraham.com/notnot.html

Here he mentions founders knowing each other since elementary school: http://www.paulgraham.com/founders.html

I believe I've also seen him on video saying that the best cofounders are old friends. I've always had this impression that he doesn't believe in "founder dating" or quick matches like that.