Having given this some thought over the last few days, in my opinion it's highly unlikely PDC would quit before the end of the season, even if he finds the new board impossible to work with there are just too many reasons for him to stay:
1) We are realistically in with a shout of automatic promotion. 2 subsequent promotions in your first 2 seasons as a manager is a hell of a way to establish yourself.
2) He's all about seeing the plan through to completion, I think he'd find it hard from a personal perspective to step away before he'd had a shot at getting us to the Championship.
3) The free rein he has had, up to this point at least, means he has been able to build almost a whole squad around him. That will be very hard to emulate at any speed at another club.
4) He is still under contract, although he could argue that the board have recently broken the terms of said contract and get out of it without penalty, that is likely to be a long drawn out legal battle, which can't be particularly appealing.
5) Loyalty. To the club, to the players and to the fans. It's the reason he stayed at West Ham so long and should not be underestimated.
7) If there are problems between him and the new board then if he shows he has the ability to work through it and still manage the team effectively then it's just another string to his management bow.
What PDC is very good at is creating an atmosphere amongst the players that means they step up their game when under pressure, that 'siege mentality' that people talk about. All this uncertainty is doing just that and is, I think, being used as another way of getting the team to think and play as more of a unit in a critical part of the season.
It's doing exactly the same to us as fans - the outstanding away support lately and the high number of tickets sold for a game against the bottom team in the division (even when you account for the reduced price) just go to show that in times of uncertainty we're some of the best at pulling together and getting behind our team.
So, I say embrace the uncertainty, we're definitely used to it in the rollercoaster that is being a Town fan. Lets make the most of the opportunity to remember what has been so great about the last year and a half and why we don't want it to end yet, lets all pull together to get behind the club at such an important point in the season, and look forward to the summer when we go up as fucking champions.