I haven't used Bing in a while and came back to check on a Bing referral string I got just a few seconds ago. Lo and behold, there's no link to my site (personalized results?) and the SERPs look like what you might see on an abandoned directory site:
The results are absolutely irrelevant. I mean, the phrase contains three words that are usually stop words: "have", "which" and "do". The SERPs look like Bing reversed the stop/search words and brings some weird results on "have" and "do" both of which are highlighted in the descriptions!
The results are crowded by two spam domains (can I post URLs here?) - the spam is rather brazen and it's both spam content and spam links to that content (blog comments).
many of the listings miss descriptions (title only)
some SERPs have 10 listings (all default settings), some 1, 2, 3 or 7. The 1 result SERP page is not the last one, the ones in the middle can have 2 listings, next SERP will have normal 10 and then another random count again
Interesting tidbit though: the "Related Searches" look a-OK. But a search on a arbitrary long tail (4-5) phrase from my actual logs today brings pages like that, completely out of whack. By arbitrary I mean not a common phrase but a phrase that a human would type into a SE if they're interested in the subject.
What is going on at Bing? They used to be such a nice search engine lately and now this? Some update going on? Do they just have an issue with long tail KWs on specialized subjects in general?