And you single out Didio why? Didio has on a long-sleeve button down shirt, just no tie. Lee also has on a button down shirt w/ no tie, and HE has his sleeves rolled up. Just because it's black, why does Lee not get called out?
The way I see it Johns in the t-shirt is the only one that really stands out. Lots of business people (even in pretty high roles) do not wear ties. I meet with CIO & CTO types all the time and more than 50% have on a shirt w/no tie.
Isn't Didio wearing jeans?
Not that I put much stock in the dress code thing. Obviously I know appearances matter, yadda, blah, etc. but I don't think the shirt or pants he wears has much to do with his ability to do his job well. Johns in a green T-shirt, though, I'll admit looks very out of place.