During the torrent encryption, what information can be seen by the ISP?

According to https://torrentfreak.com/interview-with-bram-cohen-the-inventor-of-bittorrent/

The so-called ‘encryption’ of BitTorrent traffic isn’t really encryption, it’s obfuscation. It provides no anonymity whatsoever, and only temporarily evades traffic shaping. And: As I’ve said before, protocol encryption is at best a temporary hack around ISP rate limiting, until identification techniques are put in place which use transfer patterns rather than packet inspection to identify traffic. In a research paper, they show how even obfuscated application layer protocols, such as BitTorrent’s MSE protocol and Skype, can be identified by fingerprinting statistically measurable properties of TCP and UDP sessions.