Shaddows - 3:52 pm on Aug 30, 2012 (gmt 0)
I hold that if your onpage SEO is done properly and your page generates a top result, then it will still be a top result despite personalization even if the said personalization is skewing the results.
Then you totally misunderstand personalisation.
Personalisation is, at its best, matching query intents.
At it's most creepy, its about serving documents that match your "Grade Level"
At its worst, its about reinforcing your prejudices so you never have to encounter dissenting views (the infamous bubble)