Bardin says the British were better at firing than the French because they practiced musketry more. He believed the French had the best musket, but they did not teach soldiers how to aim.
It would be interesting to research that topic - there in a lot of memoires and correspondane I find that the French and Allies did quite a lot of firing practise and also shoting to the aim - it was a constant effort, even in the armistic of 1813.
My interpretation is that the British were better to keep and maintain the quality if their infantry where the French had their ups and downs. And that they had a better fire control combined with shock tactics.
The accounts that the French skirmishers wounded and killed soldiers at long distances - is in my view a proof that they were well knew how to aim or to point their muskets.
There is the usual consense of all accounts I did read that when firing in rank and file - the line infantry did not aim.