Does the Memrise learning algorithm work with user-generated courses?

As stated, do the learning (time to review, etc.) work as well with the user-generated courses as well as it does for the Memrise core French classes?

The reason I ask, is I feel that I’m always reviewing the user-generated courses, and much less the core classes. I’m unsure if that’s a function of my proficiency with user-generated content versus core, the number of words/phrases, etc., or if the algorithms are applied correctly.