I mean the CPUs were tested early on, but later they failed, and no longer raise the average. It should be visible in more detailed statistics if it is so.
For most people an M1 is a means of accessing websites, even as a developer my dev machine has become a gateway to virtual machines and I could do the same thing on a 2008 MacBook Pro. For a few who use ML features of apps like photoshop there may be more of an occasional wait time, but it’s not like rendering a video is it, it’s 10 seconds vs 15 seconds.