Thanks for your replies. My flight is seven days from now. When making a dummy booking in CE, I can choose seats in rows 1-5. In ET, it's row 11-...
I always thought that when the curtain is moved, they move ET passengers further back immediately, but I understand that that is not the case.
Anyway, I'll keep an eye on the seatmap. Not interested in being close to the curtain as such, but I am interested in row 10 (the only exit row). Most likely scenario is that the curtain will end up somewhere between rows 5 and 9, I think.