There were some discussions about a rollback. It looks like the opposite is happening. According to Mozcast
Domain Diversity started to fall on 9/27 it has continued to fall until the last date checked 10/2/2012.
EMD influence has bounced around but on 10/2 was at it lowest point.
Also the percent of traffic by the top 10 domains has increased every day since 9/27.
What kind of interesting is the more G simply serves up the largest sites the less people use Google.
The more google sends people to wikipedia, amazon and imdb the more people will go directly to those sites bypassing G.