I don't get what the enormous fuss is over John moving to Kongregate. To be honest his games were excellent, yes, but none of them really piqued my interest to the utmost level. Of course, I am saying this after he has left and my mind might be trying to lighten the loss a little, but still. Of course he was pretty much the symbol of ArmorGames with the ubiquitous blue elephant, but it's not like losing John means the whole foundation of AG is completely ruined. There are many other developers here too, you know!
The one thing that does seem a bit iffy is what Mav said, maybe some bad problems are going on at the headquarters, but really it just seems a personal choice that we all should respect. Kongregate and Armorgames seem to be pretty much at each others' level in terms of gaming, so this is not really a completely unprecedented thing happening (well maybe it is, but still it can be understood). Something just basically must have tipped the balance between them for John. Is there really a point for nationalistic postings about how each site is better or worse than the other?
A lot of repetition from what others have said, but eh.
Best of luck to John and his job, hope it turns out awesomepossumly.