I've been watching however many episodes were originally shown on a given date. Barring preemptions, from June 27th through April 2nd, that was 25 episodes a week - 4 episodes on 4 days of the week and 3 episodes on the other 3. But since April 3rd, barring preemptions, it's been 20 episodes a week - 4 on 1 day, 3 on 4 days, and 2 on 2 days (because there weren't any episodes aired from April 3rd through June 26th in 1971, so that's 5 less episodes a week).
As for that being anything like I've ever watched DS before, in two simple words: NO WAY!
The most episodes I'd ever watched in a week before were 10 back when DS was running on Sci-Fi. The slideshow project has had me watching mostly two and a half times that.