From the man himself:
[youtube]http://www.youtube.com/watch?v=1qDfThaxmTU[/youtube]
He obviously sees the 4-5-1 as a defensive formation, which he rarely used against much stronger sides.
Just remember the way Manuel will play the team, is a way which will have to be decided by the club, as in Txiki primarily. A system to be implemented at all levels, from senior side down to toddler, and even our dear sibling in Ne York.
So will it be Txiki's 4-3-3 or will Pellegreni be the architect of the Manchester City way of playing football.