I had a few experiences in school where I felt at a disadvantage being a guy.
1. 3rd Sem Clinical Instructor basically told me right out she would fail me. I reported it when she said it, and when the issue came up, the higher ups were aware of my claim and that fact, combined with the absurd nature of why I was going to be 'failed', saved me. (I labeled IV tubing but didn't put the 'right info' on it - never was told what info it should have had besides date/time/initials.) I was placed in another clinical group and did fine. (That CI failed 3 and lost me to another group so had a 50% attrition rate: 4/8 gone. Her first - and last semester.)
2. Floor nurse in clinicals reported me and pitched a fit that I wasn't sent home for making a 'MAJOR' charting error. The error: I only documented the blood glucose level in 2 of the 3 places I was supposed to chart it. When my CI stood up for me, she poked a finger in my chest and said, "YOU MEN. You wait until we paved the way and NOW you're going to come and take what we earned. NO NO NO. Not on my watch you won't."
3. On the other hand, one of my first clinical days, I had a doc ask me a question. I was so green, I don't even know what he asked - way over my head. My phD instructor, standing right by me, answered his question about my patient. He looked her in the eye and said, very coldly, "I didn't ask you." After that, my instructor picked my jaw up off the floor.
Otherwise, besides the biggest favoritism of all: being bumped to the front of the waiting list because I was a guy - I didn't notice any favoritism during the program itself.