3 rows of 10 on the 777 (30/398 economy seats) and 3 rows of 9 on the 787 (18/247 seats). About 7% in both cases. But it's "the front row of each economy cabin", not like, "the front few rows of the economy cabin". Bulkhead and exit rows, basically.

It most definitely isn't an actual "Economy Plus" experience like United. That's sort of what I mean when I say AC is doing this exactly wrong. E+ is a good solution for, well, "plus-size" people, and United acknowledges this by offering a one-time annual subscription to the cabin. That's just the life situation for some people, it's not necessarily a perk or privilege.