Reckon most did, even if they won't admit it.
Thing is, I doubt Pep would've gone for Arsenal. I just don't see Pep as a build a dynasty type of person. Look at the way he walked from Barca and now Bayern, he seems to want to move to the next title in another country, which seems very egocentric. People will counter he built *that* Barca side, but thats because he was manager of Barca B, and they moved on with/before him to the main team (also helps he was blessed with such immense talent to work with - doesn't matter how great a coach you are, that raw potential to work with may only come together once a generation. He can take great credit in their development, but you could probably have put a monkey in charge and Messi/Xavi/Iniesta would've come through as great players).
As such, I think he'd have only taken an offer where he would be able to invest quickly and heavily in key players he wants, to add to an already strong base. For all Arsenals talk of huge war chest, I just can't see their board sanctioning the type of splurge Guardiola may want, more so if Arsene was given a directorship after retiring a la Fergie. If he took the Arsenal job, he'd have had City, Chelsea and possibly Utd all investing heavily too this summer, making it harder for his Arsenal to succeed. Whereas City and Chelsea would've given him the cash, and both have the base squad there already to make a title challenge a reality (Utd, for all the money we'd give him, don't have the base squad). You put Pep in City or Chelsea you'd probably expect next season to be those two as the main title contenders, with Pep's team winning. Put him in Arsenal (or Utd), and it becomes a 3 way with Pep possibly causing an upset and cementing his reputation - sounds tempting, but truthfully I think he'd rather take the better odds of success with City/Chelsea. Quite frankly I don't see Pep being the type to take a job where it'll take 3-4 years of hard work to build a title winning team when he can take one that has a great chance to win season 1, in 3-4 years time I expect him to be in Italy trying for a title there.
Theres probably a huge bunch of sour grapes hanging in there, because I won't deny I'd much rather have Pep at OT than van Gaal or Mourinho, but even if he had come to Utd, there'd have still been a portion of me that wondered how long he'd stay for, and how much time would he dedicate to building our future rather than instant success. I just get the feeling that winning title after title and cementing his legacy is Guardiola's aim, and once Chelsea and City offered him the chance to do it in England, both Utd and Arsenal could've offered him the world and he wouldn't have took it.