tedster - 7:07 pm on Nov 15, 2011 (gmt 0)
rewriting Titles to appear in the SERPs as what they believe is more accurate or preferable
That's done on a query by query basis.
In theory it's a good idea, one that should improve the information signal for each page in that particular SERP and help draw clicks. In practice, there certainly have been some spectacular misses while the title rewriting algorithm gets developed.