Sgt_Kickaxe - 12:58 am on Jun 9, 2010 (gmt 0)
2 years or less? try 6 months, the spam mashup site I found made an entire copy of itself already with only one letter different in the domain! Spammers have been given a gift! buy a respected site, add a script to aggregate content from EVERYWHERE instantly, and watch your indexing jump by 30,000 pages a day.
Google just made a big mistake, as is evident by the quality sites who took a nosedive and spam sites that jumped up in rank.
edit: If I find my content ranking in the top 10 and being shown to Google search visitors via mashup sites instead of mine I would be willing to join a class-action suit against Google. I find the current mashup favoritism insulting and I wouldn't even have the ability to robots.txt block Google anymore, they would be (currently are) peddling stolen content. I still can't wrap my ahead around mashup sites being what Google wants.