I'd say that it's very likely the same problem.. the other thing i could add is that I can go into my neighbor's house next door at 7 - 9pm and he gets normal ping and can play the exact same games on ...
I am having a very similar experience, I just added a reply to the below thread which you might be interested in. I have raised the issue with Orange, and i'd advise you to do the same.
This almost certainly seems to be related to something that Orange has recently implemented or changed for certain people regarding throttling at peak times or data usage.
