As Diane says, typey is a foal that reflects the things we want in our full grown horses. So refined/dishy face, curvy/tippy ears, long legs, horse proportions etc and all of these can be seen in foals. I'm bad at words with these things so I'll use my own foals to explain
NOT what you would call typey!
Sure he is is the first 24 hours, but his head is chunky his neck is short and he generally screams out "cute!" rather then "refined."
Now not being typey doesn't mean bad, as you've all seen as a 2yr old Derby is a well conformed, balanced horse with a nice neck but still the chunky face.
What I WOULD call typey
So as to be fair to Derby I think Tilly and him would be very close in age, only an hour out or so. But look at the difference! She looks like a ballet dancer on those legs and look at that dishy face! She's a bit taller then Derby so another comparison could be....
This should be another day 1 photo although Sterling has a few hours on Derby and Tilly in the above shots. Size wise he'd be right with his half brother Derby up there. But look at the difference in the face! Beautiful and dishy, cute ears with those bright, big eyes. Look at the length of leg and neck, much more 'horsey' or 'typey' then his half brother.