I would agree with that statement, Ive had mine around 130ishlol
mines limited AT 130 for now lol and my ETC isnt rated period
your 00 with W is limited at 150 technically.
and the answer, the fastest Deville is a 97-99 Deville Concourse, they came from the factory with H rated tires (no w or z was available) limited at 130, your base Deville and Deville Concourse (95-96) came with S tires (no other speed rated tires available) limited at 112.
I think you are missing something!!!!!as i was cruising down the motorway at a comfy 130 yesterday morning i turned to my wife and said "you know, those poor Americans with speed limited cars must be so frustrated"