While the difficulty is scaling it comes out to about seven and a half minutes per block, not five or below five.

https://blockchain.info/charts/avg-confirmation-time?show_he...

Interesting. Roughly 3,682,674 minutes have passed since its inception so expected blocks would be 368,267 whereas it is 391,933. Thus average should be less than 5. I guess due to low frequency of transactions the median is not the same as average.