I don't think I came across very clear here, so let me try again. In a typical four hour session in 4e, I could probably run 3 combats (1 hour each) and 3 role playing intermissions (20 minutes each). In 5e I could run 5 combats (28 minutes each) and 5 role playing intermissions (20 minutes each) in the same time. The ratio of combat to role playing ends up being something like 3:1 in 4e and 3:2 in 5e.
In both systems, we role play between combats, but because they take such a long time and the sessions are finite, we ended up role playing less in 4e, and stayed more in combat. Also, in 5e, how you initiate an encounter is really important (since they usually last much fewer rounds), so you often spend more time (relatively) trying to start it off in your favour. This is usually done in character, while pure combat often ends up just being dice rolling, especially when it drags on.
My conclusion is that since we spend less time in combat in 5e, we end up role playing more than in 4e.