Wasn't sure where to post this...
Just wanted to comment how incredibly useful "long press to expand" is in conversation views, at least for me. The native Gmail clients handle expansion of large message threads poorly. Browser client stumbles (even on powerful hardware) and demands copious scrolling once expanded. Mobile client isn't much better. Aqua's implementation is both elegant and responsive granting instant access to every message in the thread when needed. Brilliant - thank you!
Edit: posted here as I belive feature was introduced in 1.6.0
