Here's what McConnell writes on the topic, in chapter 30 of "Making Software." (The rest of this comment comes from McConnell.)
Some people have objected to the "10x" label, making an argument like "We had a super programmer on our team once. He was so obnoxious he alienated the whole team, and overall productivity was actually better without him.
In general, any practical definition of a real 10x programmer has to include the effect the programmer has on the rest of the team. I have known super programmers who were obnoxious. More often, a supposed super programmer with an obnoxious personality was really an average programmer, or worse than average, using an obnoxious personality to hide a lack of performance. The true super programmers I've worked with have generally also been cooperative team players, although of course there are always exceptions."
Some people have objected to the "10x" label, making an argument like "We had a super programmer on our team once. He was so obnoxious he alienated the whole team, and overall productivity was actually better without him.
In general, any practical definition of a real 10x programmer has to include the effect the programmer has on the rest of the team. I have known super programmers who were obnoxious. More often, a supposed super programmer with an obnoxious personality was really an average programmer, or worse than average, using an obnoxious personality to hide a lack of performance. The true super programmers I've worked with have generally also been cooperative team players, although of course there are always exceptions."