I find the "10,000 hour rule" odd (after reading both Ericsson and Gladwell). It's often misinterpreted as "10,000 hours of X will make you an expert in X", but that's not how I interpret the claims by Ericsson or the simpler repackaging by Gladwell.

I read the article you linked and was hoping it contained new research to clarify or refute the work done by Ericsson, but it didn't. The linked article regurgitates two of the key points in The Road To Excellence by Ericsson:

* You need to be engaged in deliberate practice (e.g pushing yourself outside of your current area of expertise). Not mindless work. I'm not an expert driver from my 10,000+ hours of commuting. * 10,000 hours isn't a set figure. It's an average at best. The premise is claiming that people in the top-tier (2%-5%) spent a lot of time consistently practicing their area before reaching the top-tier.

The "10,000 hour rule" hasn't been debunked. It just doesn't mean what some people assume it means when first hearing it refereed to as the "10,000 hour rule".