kfc wrotei can confirm that some IDM users have been upgraded to open speed tonight!!
Can you guys try to switch to VDSL2 or VDSL if your router supports?
Theoritically, if you have open speed, and you are connected through VDSL2, you could get 200mbps, which is 4 times faster than what fiber optic will offer (50mbps), and almost at the same price but with 100GB less to consume. Add free night traffic on top of that and you got the perfect package if you live 800m or less to a cabinet! =D