definitely. i noticed when i was a frosh/soph/junior most of the time, the teachers would talked a lot with the seniors regarding irrelevant none-school things.
and well now i'm a senior, i'm definitely seeing that as well. they're more relaxed as if to say, you're a senior, you're old enough to take care of yourself. if you fail, that's your fault. lol.
i find them less strict, more amicable, and essentially they treat you better. yeah being a senior is great!