See, when I'm traveling from Berlin to Poland I have no delay. I only notice the border because speed limits are now different. I do that on a regular basis. Last time I traveled to the UK I actually had to wait in line to show my ID. It's less of a hassle than crossing the border between Botswana and Namibia, but more than between Ger/PL. It does take noticeable time. There are people commuting across the border in many regions of europe and for them, 10 minutes every morning do add up.