Of course he is entitled to his opinion but the speed at which he gets down seems quite a specific thing to criticise him for when I imagine (please correct me if I’m wrong) there is no measurable data on that stat only.
I would imagine there is plenty of data these days on where a goalkeeper gets beaten, or if he parries then where that goes to.
That data alone won't tell you root-cause, there could be mitigating factors e.g. every single shot is hit low because he is super good at getting to high shots.
I saw someone on Twitter describe Lee Camp as having "pastry hands". It made me chuckle, I myself will reserve judgement though, a bit of experience in nets might be just what we need.