http://www.trackitt.com/discussion-forums/i485-1/65623643/page/3/
I spoke with I.O the other day, who appeared to be more accurate & better consistent. He said:
They are presently grouping the eligible cases by a system called "Case Sweeping", and developping a processing implementation, no case hasn't been approved yet as of 02/15. still building the "Case Sweeping"
From "Now" to "March 10", all eligible cases should received the actual Card, or some kind of processing information in how USCIS has adopted a scheduled forecast, possible requests, appointment, to update a such case, RFI, RFE, FP, Medical, ORIGINALS, Anything necessary to the an affected case. For eligible cases ONLY.
But April 30th is the date they WILL START responding to inquiries, and are allowing legal representative such as Attorneys, private customers, company, to submit their inquiries in an event a customer has not yet received anything, No Card, No processing information, No Nothing, probably not eligible with the revised new policy...