I've recently returned to riding after a hiatus of 25 years. Used to ride a Suzuki GSX550 in SF Bay Area. Never really gave cornering much thought then...just rode them. And I don't recall having any problems, fast or slow. Now I'm riding a BMW F800ST, and before I took delivery I took a safety course and read several well-known books on proficient riding and safety.
My problem is that I am now VERY conscious of my cornering technique, and feel like I'm "over-thinking" the line. The more I ride, the better I'm getting...so maybe it'll all fall into place over time.
But I wouldn't mind hearing how you seasoned veterans of riding developed good cornering skills.