Why is this newsworthy? Users don't care about changes in implementation that have little effect on rankings and probably very few people would notice the speed difference.
Users don't, but I'll bet a lot of hackers do. Apparently it has had an effect on rankings - what you consider to be "little effect" can be huge deal to someone whose business relies heavily on referrals from Google. And the speed difference that I've experienced is actually quite noticeable. edit: To give some concrete data, I took the queries I've done on Google today and compared the first page of results. Roughly…
I think there main go here is trying to position them self against all the new real time search offerings.