What is algorithm-driven in my twitter feed? The 'While you were away' stuff at the top? Other than that, as far as I know it's always been a chronological feed of whoever I want.
Wow, didn't know that either. But I don't "follow" people. Rather, I simply add them to different lists (finance, news, science, tech, right, left, etc.) and use tweetdeck to follow the multiple lists.
I wonder if they're also messing with the lists... In any case, as far as I can tell, I seem to be getting all the tweets of people in the list in chronological order.