That next person you hire – are you lowering the average, or raising the average? ‘Cause if you’re lowering the average of your team because you’re in a hurry, when are you going to stop lowering the average of your team? How low does the average of your team go before it’s over?
On the other hand, anytime you can raise the average of your team, it’s probably a smart move.
Seth Godin – Entreleadership Podcast, Ep. 266
This applies to technical skills, but I think it’s even more relevant to team culture.