Is that similar to the question, does this make my butt look big? Answer: No, your butt makes your butt look big.
To the OP,That's common for racers who ride the hoods and rarely use the drops except when sprinting. A lot of non pro cyclist try to adapt that "look". To achieve that look It helps when the top tube is slanted, you're flexible, young, and only ride the hoods.
I'm pretty flexible, yet still can't see me doing that for more than 90 minutes.