You're obviously technically right about that, McGrath, but I think when you read Plato's version of Socrates and then Plato writing as himself, you do get an impression of two distinct personalities. So, while Plato will obviously have modifed the reality of Socrates to suit his own ends, we are still getting a strong impression of a man who is quite unlike Plato. And the reason I am inclined to think that Plato is being fairly accurate is that the Socrates he paints is a lot more likable than Plato himself comes across. And if Plato was being dishonest, you might expect the difference to be the other way about.