Absolutely. I actually started listening to discover weekly playlists without giving it any feedback and it started based on my previous trends and gradually drifted into the more main stream stuff.

Once I realized I just needed to give its recommendation engine more fuel to work with and started liking/adding things I actually wanted to listen to, it went right back to giving me cool stuff with loads of obscure artists I'd never heard before but liked a lot. (It really only took me about two weeks to right the ship).

Spotify's recommendation algos are excellent.