It was good while lasted, but Valve reverted the sticky nerfs.

I can understand why Valve did it, because by making the Demoman weaker, you change the whole rock-paper-scissors between the classes.

At worst, it may raise stalemates because ubering a demoman won't be the big pusher he is right now.

Still, not all hope is lost. Valve said they are re-evaluating the nerf so I expect Demoman to be hit by the nerf in some other way. Less ammo on the sticky launcher maybe?