每个人打电话到uscis时都会得到不同的说法，每个人都会有自己的判断。我觉得在现在的情况下，以下这个说法比较合理。当然，不要太纠缠那个date，uscis从来以低效著称，也许他们会delay一些。这也解释了为什么现在批的很少。
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...