That would be in line with Apple's claimed performance numbers.
That said, a Mobile RTX 3080 has much more performance than a Mobile RTX 3080. No, I didn't make a mistake there.
Nvidia's Mobile GPU lineup is so fragmented it's ridiculous. When you have Max P and Max Q variants, then different TDPs, it's almost impossible to compare. In Apple's presentation, they describe a 160W 3080, which according to Apple's unknown benchmark suite, narrowly pips the 32-core M1 Max. It also shows a 100W 3080, which gets trounced by the M1 Max.
If you went into a store and saw two laptops with 160W and 100W 3080s side by side, they would not be branded any differently.
The result is we will have benchmarks showing the M1 Max being beaten by 3080s, right alongside the exact same benchmark showing the M1 Max thrashing the 3080.
Even before we get to the vast architectural differences between NVIDIA's Ampere and Apple's custom GPU architectures, meaning that for specific tests, the relative differences between the two may easily swing to ridiculous levels.
I think it's clear that in this case, we might be best to ignore benchmarks, except for the lowest level ones (which are useful because you know EXACTLY what they are doing) or the highest level ones like 3DMark, or other specific rendering ones (because they are clearly representative of real workloads).