I got the Eclipse Phase AP a day ago, and I've already listened to it in it's entirety. However, I constantly had to skip back on the Wild Talents game and it took me about a week to listen to it completely.
Of course, that's more because of personal taste since I like sci-fi more than superhero stories.
In my opinion, a two-per-week posting cycle is great and not overwhelming at all. In fact, even if the posting cycle went even further, it would be nice to pick and choose the APs that I would like to hear the most and listen to the rest as a backlog. That's basically what I do when I get the APs for donating to the Kickstarters, and it's a great feeling to have more APs than I can listen.