ya, try it out. Great thing about a new cog is it's only like $20 so if you don't like or can't handle it, it's not gonna burn a hole in your retirement.
europa made a good point about cities not always being flat and wide open. I started on 86 gear inches, moved to 82 so sliding and stopping was easier, and am moving down again to 80 gear inches just because it is a more practical gearing for around town with all the stop and go