The 950 should have always identified DD and DTS 5.1 sources as 3/2.1 - the first number is the number of front channels ("2" for left/right, "3" for left/right/center, or "1" for a mono center), the second number is surrounds ("0" for no surrounds or "2" for stereo surrounds), and the third number is the LFE channel ("1" for a LFE channel and "0" for no sub). If you are seeing 3/2.1 then the 950 is receiving and decoding a 5.1 source.