I've come to expect the opposite: Resentment and resistance.
I think it has a lot to do with your city. In NYC, I would probably blend in and be considered an average dresser. In Ottawa, the second you deviate from the usual walmart square toe clunkers, baggy black suit, and hot pink mexx shirt, you stand out (a lot). You would think that standing out in such a way would be overwhelmingly positive, but it's surprising how openly negative reactions can be.
I was sporting a bow tie the other day, as I often do, and I had an interesting reaction from a couple. I noticed the woman giving me a big genuine smile, then the man made comment under his breath. The woman retorted with "you can't say that! James Bond wears bow ties..." I can only assume he said something to the effect of "look at this homo in his bow tie." Another man pretended to spit in my direction when I was walking by him in a mall that same day.
I think it's a mix of homophobia (a thinner guy who dresses dandy must be gay) and resentment because they assume I'm some hotshot. Both are false assumptions.
It's not all negative. I get lots of compliments and questions too; most people here have never heard of Allen Edmonds, and would never pay $400 for a pair of shoes. Overall, it seems very polarizing. I've learned to be ready for anything and take the stoic approach. At the end of the day, I dress up for me.