I think that google favors its own domains in search results as youtube and blogspot, however they may not be the best in the search results. also I think that sites publishing adsense are favored too. I think this is kind of monopoly and may bring google down
Yeah I don't agree with your assumption either. Youtube and blogspot are favored because those domains have a very strong link profile. It has nothing to do with the fact that Google owns these websites. There are thousands and thousands of junk made-for-adsense websites that don't get good Google rankings.
very interesting opinion, i dont think publishing adsense on your site or blog mathers in rankings. But i do think that blogspot get slightly favourd by Google
when a blog is 2 or 3 months old it talks its own rankings and become as new domain separate page rank, links, .. etc also some subdomains linked to wordpress or others are not ranked well as blogger and they also have strong link profile. I think it is so obvious 60% of my searches on google shows either : youtube, blogspot, google news results at top same search on yahoo or msn do not show as this.
I too believe that if you start one wordpress and one blogger sites, and do the same for both, blogger will be first.
IF Google gave preference and ranking to it's own property sites (like on blogspot or youtube) that'd be grounds for one heck of a lawsuit. Wouldn't it.
The whole link cracking down on thing is the monopoly. They don't want us to buy or sell links but then they sell millions a day. That's not hypocritical.