I sent my PLR-22 in on 2/8/10 and it was shipped back next day air on the 26th, so I could have potentially had it back on the 27th if there was Saturday delivery. Instead I got it on Monday 3/1/10. So, exactly 3 week turnaround for a PLR. Haven't had to send my P3AT in for anything.
Never had a Kel Tec go back for repair but I had 2 Taurus guns go back. They took 9 and 12 weeks respectively. 6 weeks is not bad. In retrospect, I work for a small firearms company and we feel bad if a warranty gun is in the shop longer than 2 weeks.