The third time’s the charm, the idiom basically dictating that the third attempt at something is likely to yield the results desired, apparently didn’t sit well with Google.
The algorithm change which happened April 28th – May 3rd, nicknamed Mayday, showed a shift in long tailed search results. It’s been hashed, and rehashed all over the web, but basically put, it was done on purpose, it was done for quality purposes, and it’s completely algorithmical; no human interaction at all.
Since the Mayday change, there have been 3 more seeming drastic shifts in the SERPs, with some seeing changes as little as 10% shift, to as much as an 80% drop in results. Reports of spam sites taking front page placements, poorly written, poorly constructed, and ad filled pages replacing formerly authoritive, professional sites. The shifts being discussed have all been around long tail returns, with the shorter queries having only slightly adjusted.
After all the ideas have been discussed, the tin foil hat theories disected, there emerges one common, agreed upon result: the first week of July will be a doozy.