I can confirm. I have also worked with a number of programmers who have been 5x as productive as an average programmer and one who was easily 10x, possibly more.

My old manager handed Mr 10x a company chequebook and said "write your own salary in there… just don't leave". He left. He wanted challenging work more than he wanted money.

These people exist in all fields: maths, art, music, literature, sport. It is amazing (and somewhat dispiriting) when you meet one, however working with one is, in my experience, only inspiring.