Is Miles Morales the (Ultimate) Spider-MAN?

There's been a lot of controversy about the new Ultimate Spider-Man.
The sometimes-heated discussions about his ethnicity have been rather...revealing.
But, perhaps the most important question has been all but ignored...
Is Miles too young to be Spider-Man?
Look at this page...

Click on art to enlarge

He's apparently 12-14, and short for his age.
Now, Peter Parker was a high-school junior/senior, average height, but thin.

So 17-18 isn't unreasonable.
Even in disguise, he's not that imposing a figure, but obviously a young adult...

Even in costume, he looks almost as frail as the elderly security guard...

In the first year, before Ditko was told to "bulk him up", a number of foes would intitially snicker and make derisive comments about the "skinny twerp in the spider costume".
Then Spidey would kick their butts.
After Ditko left, Spidey's look became more muscular until he was on a par with most other acrobatic heroes like Daredevil or Black Panther.

How is a 12-14 year-old (even spider-enhanced) possibly going to look like anything but a kid in a Halloween costume when going toe-to-toe with characters who look like Schwarzenegger in a funhouse mirror?


Spider-Boy, maybe.
Kid Spider, perhaps.
Spider-Man, nope!
Try again when you grow up, Miles.