I think they are talking about the CSR wheel which was shipped with FW 706 as standard for most people.
i'll be honest though and say that i really only used my CSR with a 360 for the first 8 to 10 months, and i too stuck with 706 for a while, i upgraded after around 4 months and felt that none of the updates to the firmware felt right, either a dead-zone or notchy feeling around the centre etc. but i settled for 737 in the end.
then i built myself a PC around 4 months ago, i stuck with 737 for a while then recently upgraded 756 and the latest drivers and yes it just feels better, IMO if your running the CSR on a 360 then FW706 and 737 were good, but on the PC it's a whole lot different, i would advise on 756 and also the latest driver. but thats just my opinion don't forget.
if anybody needs any of the FW and Driver updates for the standard Fanatec CSR Wheel i would be happy to pass them on, as ive archived them all
Peace Out