> No, their statement says nothing about attack attempts.

That's a good point. The best way not to know about any successful attacks is not to know about any of them. I also can definitively state that I'm not aware of any successful attacks, but for obvious reasons this is a basically meaningless statement. Without more data, it's not clear how meaningful the statement they gave is, and while it probably is more meaningful than mine, it doesn't make sense to jump from what they said to "there have definitively been no successful attacks" based on it.