I have excelled at the sloth part. I could sloth for my country!
1. a combination of both
I'd hate for you to think that I haven't been enjoying the educational things you've posted, because I really have, even though I haven't been drawing. I'm in the middle of a pretty labor-intensive art project right now, and all my drawing time and drawing energy is going toward that. Which I know intellectually is dumb, because things actually work the opposite of that, generally: the more diverse exercises you do, the more you are CAPABLE of doing. But gah, it hasn't been panning out like that.
For the time that I spend on the exercise prompts, I've found that I'm spending it reading rather than drawing. And it's very interesting reading! It's just that I personally haven't been able to do both the theory and the practice in the past couple of weeks. So, in answer to your second question... I don't know.