I have seen a couple leafs on my drive to work. I know of 2 Teslas in my neighborhood and have commonly seen a third between my house and work. I know they are different ones because 2 of them have vanity plates.
I was surprised to see them because I don't consider where I live to be a big Tesla type area.
Tesla is prevalent in CA, particularly in the SF Bay area. Nissan manufacturers the Leaf battery in TN, so it's more prevalent in the Southeast. I see them all the time in Atlanta. It helps that GA has a $5000 state tax credit on top of the $7500 federal tax credit.
I am seeing Teslas daily in CT. Leaf or Volt - not so much.
Where in CT? I spend a fair amount of time in the Hartford area and have never seen one.
I work in downtown Chicago and I see them constantly.