Unfortunately, asking what size front tire other people are running just doesn't tell anything important. When you changed tires you changed the brand and model of the tire. That means you changed the tread compound, tread shape, sidewall and carcass stiffness and who knows what else. These things caused the difference in the feel of the new tires over the old ones, not the difference between a 110 and a 120 size.
As for whether the 120 tire is being pinched or not depends on how it was made. Not all 120 section tires are made for the same width rim and if your new tires were made for an EX500 front rim width, then it would not be pinched. If the tire were made to fit a wider rim, then it is being pinched. If it's being pinched, it might handle quicker than the old tire (though that could also be because the old tire might have been worn a little flat in the center with highway miles). If it's not being pinched it could handle slower than the same model tire in a 110 size.
What you didn't tell us, that we all would really want to know, is what brand and model of tire did you replace your old Bridgestones with. That would be more important to me than the change from a 110 to a 120 section front tire.