For me a diploma means that the person should have the capabilities which doesn't mean they would be a great fit for the job.

That is 100% accurate and only time will tell.

While maybe in the back of my head I probably do think that I am smart/clever, I will never say that out loud.

Correct again. Never advertise yourself as smart or clever or expert. That is for others to decide and as they say, actions speak louder.

Maybe you're right about short time span of concentration increasing in the upcoming period, would be great, but it remains to be seen. Time will tell.