The fact that you say I'm wrong and then use the words "I think" in your response is telling. I count 8 players drafted in Rounds 1-7 that are as short as or shorter than 5'10" (according to the NHL.com draft report, which is as official as they come, though stats are often lied about), though admittedly no defensemen. (Of course, you might have meant second-shortest D of the entire draft, in which case you'd be correct.)
I figured Enstrom as a 6th rounder, and was surprized that he fell to the 8th, but not shocked. It was a deep draft, to say the least. I know a few teams will regret passing over him, such as the local Sharks who took a waste of ice in Trembley, but such is life. There aren't many impact D that are shorter than 5'11", for sure. Some, but not many.
Back to the topic at hand, Smid is looking like a good 1st Round pick to me, while Hedman looks like an upper-to-mid 2nd, though that is a surprize to nearly nobody.
~Crazed.