Even as a researcher of practical implementations of quantum computers, I'm having difficulty answering this.
I'm tempted to go 50/50 with 1. We have AGI before large scale (more than 40 entangled computational qubit) quantum computers, or 2. Quantum computers will only marginally accelerate AGI timelines.
Large scale quantum computers would greatly accelerate research of a lot of sub-problems in chemistry and physics, but it's hard frame those gains in terms of what we need to do to actually build an AGI. From a fundamental algorithmic-gains perspective,...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.