One site broad content, or several focused sites

which is better for SEO and Adsense?

[Tearabite]

which would be better for SEO and Adsense in general - or would it make no difference?

One 'mega' site, with broad content on lots of different subjects (although, all with same 'slant')

or several smaller sites and domain names with the same 'slant', but individual subjects?

[Jane_Doe]

My favorite advice from Brett -

"Long term SEO rocks on the net today because those that survived the purges, survived because of one simple premise: diversification. Build pages big, small, in between, high density, low density, multiple small domains, single big domains, lots a links, no links, deep content, shallow content, but content, content, content. Keep those users come back for more. Make the search engines your unwritten partners - even when you feel they let you down. Give the visitor what they want, when they come from an SE to your site."

[webmasterworld.com...]