That dovetails with my own experiences. I installed tomb raider on my m1 air, and while it was playable i was not impressed with its graphical abilities. The m1 is great for integrated graphics, but not on par with dedicated graphics. CPU-wise it is the fastest computer I have though, noticeably faster than the i5 9600K in my desktop.
The Apples to Apples comparison (if you will) is to other integrated GPUs.
>The first Apple-built GPU for a Mac is significantly faster than any integrated GPU we’ve been able to get our hands on, and will no doubt set a new high bar for GPU performance in a laptop. Based on Apple’s own die shots, it’s clear that they spent a sizable portion of the M1’s die on the GPU and associated hardware, and the payoff is a GPU that can rival even low-end discrete GPUs.
https://www.tomsguide.com/news/macbook-pro-m1x-benchmarks-ju...
It should be adequate for a non-entry level laptop.
One of the fairly accurate Apple leakers, Jon Prosser, has said that one of his proven sources has informed him that the leak is legit.