It's true.....You can find this information in USCIS website: Press Room link
USCIS is making every effort to address the delay in its data entry and fee receipting process. The prioritization of data entry for specific form-types was a proactive measure on the part of Service Centers to address the unprecedented level of H-1B filings received on April 2nd and 3rd, 2007, as well as the unprecedented level of filings for other immigration benefits. USCIS would like to assure its customers that the delay in data entry and fee receipting will not affect Change of Status or Extension of Stay eligibility, assuming all other eligibility requirements are satisfied. USCIS would also like to assure its customers that per existing policies and procedures, requests for Premium Processing Service will continue to be processed within 15 days.
USCIS wishes to assure all customers that the original received date (the date which the document is date stamped) will be honored and recorded on the receipt notice. This date will appear in the "Received Date" box on Form I-797, Notice of Action. The received date is different from the "Notice Date", which also appears on Form I-797. The Notice Date is the date the receipt notice was actually generated.
http://www.uscis.gov/files/pressrelease/ReceiptingTimes071307.pdf