I confess that it crossed my mind. Torrents are obviously network-oriented and are often used to interact with, uh, untrusted content (the torrent files but also the trackers and peers that exchange data with the client). The surface of attack is rather large, using a memory-safe language doesn't seem like a luxury. I also can't imagine wanting to write C++ in this day and age, but that's my prejudice.

That being said I've been using transmission for years without complaints, so I trust them to do the right thing.