In reply to Sl@te Head:
Very impressive. Kudos to the lad.
I guess his dad must be made of pretty strong stuff. I remember my son's first lead at about 11. He'd been following me up Severes and Mild VS's, so asked if he could lead a slabby Diff. 60 ft up and 20 ft from the top he announced he couldn't get any runners in (having gone past several good placements I hasten to add).
I could see all sorts of unwelcome newspaper headlines if things went wrong, but fortunately he heeded my advice to think about where he was going to put his feet, and the handholds would just appear.
Going on the basis of not letting him lead on anything more than 4 grades below what he was used to following, I'd have had to be climbing E10 to let a 12 year old of mine loose on an E6.