[Jensson]

Just accept people who has held a lot of conference talks before and it will be fine. That is the fastest and easiest way to review, so unless there is pressure to do things differently that is how most will do it.

If there is space still left at the end you can look at the others and take the first paper that looks fine until there are no spots left.

[ghaff]

There is (for good reason) more focus today on diversity--broadly defined e.g. new speakers--for non-academic conferences these days. However, there were quite a few conferences in the tech sector historically that tended to have a core of "the usual suspects" with others grabbing a smaller number of leftover slots. TBH, I probably benefited from this over the years. (Conferences run by companies follow somewhat different rules but still usually have a stable of Top Rated Speakers who tend to get slots.)