Old data as in years old? This site is 10+ years old and hasnt been PR2 in years... BUT!! I am encouraged with your statements.
I know of some changes also but a very small amount. This could just been one of those tidy up changes that happen every so often.
I see a few 'bounces' on several domains I've been watching. Some are encouraging and some are concerning... it's like deja vue all over again.
I can understand that as this seems a minor 'movement' to me so far. Of the numerous domains I watch only a handful are seeing any activity.
My Link Checkup program tells me that 15 out of 773 sites I advertise on have changed PR in the past week. Two went from PR0 to PR3. All the rest dropped in PR.
I just check about 30 or so sites.... it looks old to me. I check our new sites that have PR from this last update.... it shows PR0's & PR5's It's OLD. how many of these threads are we going to have?