Although the video above seems pretty definitive, there is a great deal of variability among us. After a while, you just know what feels right. Copying some else's style or cadence or gearing is foolish.
Personally, unless it is very steep and very short, I'd rather sit and grind it out in my 34-32. In my younger days, when all we had were 42-26, then it was either stand or fall over. Much more fun now.