It's weird...do an image search for CAAD10 and some of them with 17 deg stems look great...and some look like the front end is drooping (like the evo you posted).
I suspect that it's due to the top tube angle staying relatively similar but the head tube angle decreasing for smaller sizes meaning the stem gets brought up and becomes less droopy
(The dale stems are 6 deg.)
It's weird...do an image search for CAAD10 and some of them with 17 deg stems look great...and some look like the front end is drooping (like the evo you posted).
I suspect the smaller sizes look better with 17.