Do the plants look stunned? Should they be this sm...

They're probably bigger than they should be, it looks like they're stretching. I would consider dropping your light a few inches. This will actually slow vertical growth for the next week, but you want that. Your baby needs to develop a root system right now. That's her purpose. Instead she's spending energy reaching for the light.

They're definitely stretching a lot. i don't see a fan in your setup, so I highly recommend you get one. It'll strengthen the stem. - Size of the plant itself not taking the stretching into account, looks pretty normal under a 150w HID, tho you could probably lower the light a bit to avoid more stretching, and I'd definitely recommend you fill up the rest of the pot with grow medium to cover a bit of the stem.

they are up and they are new, all is normal with them, you will see slow growth for a few weeks where it seems nothing is happening, the plant is like an iceberg, growth also happens underneath, those roots are getting deeper, and they are growing and stretching and growing into a super root heaven. to answer your question. everything is normal. remember to water but not over do it