Here's how it works in our group. The professor gives papers to the PhD students or PostDocs, who read the paper completely. I regularly 'sub-review', as it is called, meticulously looking for issues. I have heard that there are professors who review entire papers in 2-3 hours, since they have a lot (10+) of papers per conference to review without any compensation while they have their own research, teaching, and funding to juggle.
It's not a pretty system sometimes.
Edited to add: Conference's also require declaring that there was someone who sub-reviewed the paper. The professor / PI mentions the PhD student's name in the review form of the paper. Of course, the professor also double-checks all the sub-reviews
It's not a pretty system sometimes.
Edited to add: Conference's also require declaring that there was someone who sub-reviewed the paper. The professor / PI mentions the PhD student's name in the review form of the paper. Of course, the professor also double-checks all the sub-reviews