[chakalakasp]

They can see your encrypted packets are going to a known VPN IP; that's about all they can tell. They can't peer into the tunnel. If you are sending and receiving hundreds of megabits per second day in day out they can probably infer you are torrenting, but are unlikely to care unless your bandwidth usage ventures into their "user abusing our networks" territory.

[disposablezero]

Lots of traffic only proves possibly abusing TOS, nothing about the content of said activity.