Okay, so it seems I’m the first person to notice this.
I bought the Force Awakens Blu-Ray+DVD Steelbook from the dutch website bol.com.
The copy of the film on Blu-Ray is perfectly fine, but there is a strange issue with the DVD version.
I don’t know whether this issue is also present in other versions of the DVD, but I haven’t seen any posts about it yet.

The film is sped up more than 4%, changing the runtime from 2:18:06 to 2:12:26.
The movements are faster and all sounds are higher pitched. This is most noticable in the music.
I tested the dvd on several different players, and the speed issue is definitely on the disc.

I made a short video showing the difference.
https://youtu.be/ax0dm43jhP0