I am doing SEO and maintenance for a domain that, for almost 12 months had only 10 pages. 2 months ago, with a new design and more then 50 pages, I start "growing" this baby. I am adding 1 page/day, start building a link campaign, stuff like that.
Anyway, even if in MSN and Yahoo most of the new pages are cached, G keep re-caching only that 8-10 old pages. Even more today I noticed he excluded 2 from the old pages.