OK, so I just read three different articles about Man U's debut under Van Gaal. All the talk is naturally of their new formation.
One writer called it a '5-2-3'.
One said '3-4-3'.
And one (probably an idiot) called it '3-5-2'.
Personally, in my book, when not in possession, if the wide players are forced to defend side-by-side with the three centerbacks, thats 5 at the back. When on attack of course they will flood forward! They are the only wide players on the field, so they need to get as far forward as possible (while still being able to get back).
By this reckoning, Inter played a 5-4-1, or 5-3-1-1, this last season. I am coaching youth soccer here in Canada, and they want coaches to use their terminology, versus accepted European terminology! LOL... Good luck with that.