Reports like these are useful in deciding whether the P800 merits the same reputation as the 3880, and they'd be even more so if the general humidity conditions were included in the report.
For the first 4 or 5 months, my p800 was in a room that was a constant 45% humidity, (controlled by a humidifier attached to a water line so it didn't run dry). No issues.
Since June, the printer was moved to my new home, where I haven't installed the humidifier yet. I'm not sure what the humidity has been, but this was through the summer in Utah which is a somewhat dry climate, so it certainly was well below the 45% of the other location.
My printer usage for this printer is occasional, I would tend to go a couple of weeks or maybe even longer on one or two occasions, then print several 13x19" test prints for a few days, then it not use again for a while.
I haven't had a clog since I moved the printer (I've only had one small issue since purchase which was in the first week). So from my experience the printer seems every bit as good as it's predecessors (3800/3880).