Rethinking the tuning fork/pitch fork thing.... it could also be called a pitch fork because when struck, it sounds the correct pitch such as A440.
Of course it could be, and you said it so naturally that I even thought it was just another of those differences between British and American English, that "pitch fork" was the normal name for it on your side of the Atlantic. I only mentioned the farmer as a joke.
But if you bonk it on your head or knee, who knows...
Speaking about transatlantic differences, be careful: Bonking has a very specific meaning over here.
Anyway, about my piano.... I was just playing it a moment ago and the sound does bother me somewhat.
If, as you implied earlier, all the octaves sound fine, and the problem only arises with particular chords, it might be a good idea to keep a written log of what the problem chords are, and which notes in them bother you most. Do this before you get used to the new sound. Also, since you have the equipment, record them. Does the intonation sound equally off on the recording, or does it only seem so on the live piano, similar to how the competition piano sounded better when you were a bit farther away?
If it does also sound off on the recordings, then keep them until you think you've gotten used to the new sound. Then listen to the recordings again, and if they then sound less off than you remember, you'll know that your perception has changed. Of course the piano's tuning itself may have shifted too...
An experiment worth doing is to take the chords that bother you and transpose them into different keys. Up or down a semitone or two (or 3,4,5,6, i.e. try them in all keys). If they don't sound equally bothersome in all keys, this would tend to suggest the temperament isn't even and your new guy may have messed up. It would then be worth talking to him about it sooner rather than later.
At SIU we had a pianoteq on faculty and he used the "old-fashioned" method. I am pretty sure he had perfect pitch, because otherwise I don't know how he could do it without some type of pitch reference device, like having a laptop like your old tuner.
Do you mean "perfect" as in absolute or relative? I think it would be extremely unlikely for someone to have absolute pitch accurate enough to be able to reproduce A440 out of the blue to the level of precision now generally expected. He would have had at least to use a tuning fork, provided his intention was to tune a piano to standard pitch. But if he was going around simply adjusting a few notes here and there which were a bit out with the piano's general level of intonation, to make sure the piano was simply in tune with itself, then no pitch reference would have been needed. A good sense of relative pitch would help to get all the semitones in the middle octave roughly right in relation to the fork, by using natural intervals like fifths, fourths, and thirds, but the fine tuning, which involves distorting the natural intervals to fit equal temperament, tends to rely more on special techniques like counting beats than on good relative pitch.