I would say that I'm above average, but I had some problems when I was learning. I was scared to go above 40 at first. I still hate parking and my ex used to laugh at me because I had the worst time parking her 4 Runner.
I think the biggest turning points for me was a) putting on over 10000 miles on my Civic in 10 weeks and b) being taught by test drivers at Ford Proving Grounds. Talent is nice, but I think experience and learning from other people's experience helps a lot more. The important things I took away from all this was learning to "feel" what my car was doing and being smooth.