I think we are just seeing a lot of different tactics by bidders playing out, with auction Snipping being the order of the day. I have sold in the past LLLs on domainlore where the last bid was hours or even the day before. Even the latest LLL I have sold today at UKBackorder.com the last bid was just an hour before the auction closed.
Watching Glasgow.uk climb ever upwards but all last minute / overtime bidding.
JohnP