Yes, those are Brussels sprouts, in a condition a lot closer to the one in which they grow than those little green globes which we buy in boxes. They looked so fresh and succulent in the store that I brought a stem home with me. Guess what? Brussels sprouts are Brussels sprouts, on the stem or in the box. We noticed no real difference in taste.
On the other hand, when you walk into the kitchen and see a two foot log of Brussels sprouts, it's bound to get you curious.