"They are not a micro company any more - why would they be able to feel like one?"
It can be done, but it takes a lot of work (and by "work" I mean "the pointy-hairs leaving the engineers the hell alone". That seems to require a huge effort in some companies.
Noted on the skunkworks thing. I do think in general though that managers do fairly well at leaving engineers alone at Google; the big company feel seems to come from engineering inertia a lot - inflexible coding standards, groupthink on which technologies to use, etc.
Mostly though I was hoping for a little clarification from the parent poster of why Apple should feel like a small company more than Google does - both would seem to be great places to work, but I wouldn't expect either to feel small.
It can be done, but it takes a lot of work (and by "work" I mean "the pointy-hairs leaving the engineers the hell alone". That seems to require a huge effort in some companies.
The old-school name for this is "skunk works".
http://en.wikipedia.org/wiki/Lockheed_Skunkworks