You can try to pause the game to see it... But I think it might actually be 2.0.
Don't know if the Survival Run goes beyond double speed, but I sure know it can be hard to get a section to safely pause at that speed if the game doesn't play along. ๐
The speed doesn't change after like 200 to 300. But the obstacles are usually more challenging later on in the run. There is a lot more holes to fall down.
I think there is a last speed increase at 300 trophies (correct me if I'm wrong), but you get used to the speed at some point. So if we keep up the good work everyone here will get an even higher total trophy count, season by season ^^