There is nothing better than receiving a thank you note for simply doing your job. I must admit that I have never thought of it in the context of the writer being a potential top talent though. A thank you note certainly demonstrates a number of valuable behaviours including gratitude, thoughtfulness, proactivity and resourcefulness all of which would be good to haves for a values based organisation.

It represents a decent person which is a good starting point but I think there is a lot more to do to qualify if the candidates is truly a top talent.

Here is another article that looks at the behaviours of a high potential leader http://thoughtleadership.collingwoodsearch.co.uk/post/102epls/leadership-potential-what-employers-are-looking-for-its-not-one-size-fits-all