When I move my characters all the way across the screen (bottom to top), they take about 6 seconds in the original game, but arrive there in about 3 seconds in GemRB.
This is using the same savegame as intial position for both engines. It is attached to bug #3095581.
I have the same issue but it seems that ingame time is passing ridiculous too fast. I get some party dialoques on BG2 every 10 seconds , and the clock in the corner swing very fast. Only this issue keeps me from play as for now.
BTW. This occur also on ICW2
The banter issue is different; there's an extra timer for that and we get it wrong somehow.
I might have fixed the timer issue, so npc talk may be fine now