I have heard that some people may receive both SBP and DIC without the offset. Is that true?

Yes, this is in fact true!  A recent court decision makes certain beneficiaries eligible to receive both SBP and DIC without the dollar for dollar offset.  This population is limited to widow and widowers that have remarried on or after the age of 57. 

To learn more about this court ruling, please visit the Defense Finance and Accounting Service at http://www.dfas.mil/retiredmilitary/newsevents/news/AnnuitantsSBP.html