They mentioned the signalling overhead for the same amount of data. So the smartphones are not taking a full burst of traffic OR are too slow at responding to keep the next request within a window (connection). Or is the type of apps used generates more small data packets compared to laptop usage.

I can also understand the overall quantity and concentrations of smartphones can be causing problems.

You figure with 16-32 gigs you would be able to cache gigs and gigs of data.

Well buhuhuuuuuuu. Cry me a frik'n river. O2 knew what they were getting themselves into with the iPhone exclusivety deal and they should have known that their network sux big time.

Smartphones strain networks

Isn't that a bit like saying "Water is wet" or "The Inquirer don't use a spell checker"?

Kind of stating the obvious isn't it?