While I don't have a 950, I do have TW Digital Cable with a SA HD3100 Hi-Def decoder I feed the digital output from it to my Outlaw 1050 which is set in 6.1 mode. On movies that I believe are EX, the 1050's display shows dolby digital surround and the rear surround light stays on. When the movies change the rear surround drops off. Consequently, I believe my 1050 is properly getting and receiving the EX flag.

If the 1050 is able to detect the EX flag, I have to believe the 950 is capable as well.
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Living Room 24x18 open 1/2 flight up to a raised dining room/hall 24x12
Outlaw 976 pre-pro running 5.1 system
Outlaw 750 for Artison Masterpiece LCR and 2 NHT SuperZeros rears
Velodyne Servo FX-1200
LG OLED65C8PUA via HDMI2 to/from 976 HDMI ARC
Roku Ultra
Samsung BD-D5500 BluRay
Amazon FireStick 4K to 976 Aux HDMI input for Amazon Music Ultra