FWIW, some co-workers of mine attended a sony-sponsored training specifically for the 4K XBRs. The Sony trainers also told them the sets were native 120Hz, and they had some sort of explanation which didn't make much sense to anybody.
every website that sells the W802 also seems to indicate that its 120Hz native evrn though its XR480. Not really sure what's up with that, and why they'd choose to equip a flagship TV with a low refresh rate if that's true.
Since Sony has started using the convoluted XR ratings, i recall they also had a separate space buried in their specs page dedicated to native refresh rates for each model, which seems absent on 2013 model pages.
ht Panasonic 60" ZT60, Monitor Audio: Silver RX6, RX Centre, Radius 90HD; Martinlogan Dynamo 700, Marantz SR5006, PS3, Oppo BDP-103D
2ch Sony KDL-32W650A, Sony BDP-S1000ES, Marantz PM8004, JVC T-X3 tuner, Monitor Audio Silver RX1, REL T3, Apple TV, Peachtree Audio DAC•iT, Sennheiser HD598
lr Panasonic 50" ST60, Sony BDP-S5100, Apple TV
pc Energy CB-5, Audioengine D1, FiiO A1