lucy24 - 10:52 pm on Jan 9, 2013 (gmt 0)
In fact, MSN/Bing is still requesting pages from the same site that haven't been online for three years.
Based on behavior on my site, Bing-- unlike That Other Search Engine-- doesn't seem to distinguish between 404 and 410. Requests for 410 that are more than a month old are at least 99% Bing. And most of the rest are those casual robots that only stop by every year or so.