The statistics here are actually encouraging. (The prices, not too much.) (H/T Gil.) It was just last night, at a shiur, that someone mentioned that combination of kosher meat and cheese at non-kosher Israeli McDonald's actually may make them worse than the equivalent outside of Israel. So here we see that cheeseburgers aren't even advertised and barely ever served, and that 70% of (secular?!) Israelis want kosher meat, and only 5% davka want non-kosher (whatever that means).
What's interesting that (most) Jerusalem locations aren't kosher. (In fact, it's the last non-kosher place on the eatery-heavy Emek Refaim.) I think that may be the tourist trade, though.
Not ideal, of course, but a very good sign, I think. One commenter on that article wonders if it's really about being open on Shabbat. Based on this, I wouldn't be surprised if that was a big factor.