Allardyce is very much a manager from an earlier era but I think the current "model" for young, European coaches has generally under-whelmed. Loads of the more middling teams have tried this route but the success is never that long lasting. If you like, Selles very much fits the bill with regard to the kind of manager clubs likes Watford or Fulham employ.
I think Selles was promoted to the role of manager too quickly. He still needs to prove himself as a coach in the UK and was not ready to step up. I feel a bit sorry for him and he has been dealt a poor hand. I would imagine that he is someone who will go back to Europe for more experience and then end up at somewhere like Watford in about five years time.