An update in AILA Infonet mentions Charles Oppenheim (the man who creates the Visa Bulletin) states-
” On March 16, 2012, at the AILA Midwest Regional Conference in Chicago, Charlie Oppenheim, Chief, Visa Control and Reporting at DOS, informed participants that he will likely retrogress India and China-mainland born Employment-Based Second Preference priority dates to around August 2007, effective with either the May or June 2012 Visa Bulletin. He also advised that he projects that all EB-1 visas available in FY2012 will be used this year, resulting in no “spilldown” to EB-2.”
So there you have it. A prediction that is actually reliable from the creator of the monthly visa bulletin.