Honestly? When I was at uni - I NEVER did 10 hrs per subject. Absolutely NEVER. I worked 50 hours a week and was "at uni" 10 contact hours a week. That was lectures. I didn't go to tutes!

Didn't make a difference to my marks - I'm a crammer, so my last 2 weeks before exams were plain study. Only to promptly forget everything in the subject as soon as I walked out of the exam.

For me, university was only a basic building block to my career - it's life experience and work experience that make me the professional I am today.
^^ Describes my uni experience to a T. I did my assignments last minute, crammed for exams in the 2-3 weeks (sometimes even 2-3 days!!) before hand. I passed ok, but uni really didn't advance me toward my career as such. I was lucky enough to gain a professional placement two weeks after I completed uni and I haven't looked back.