Absolutely. Should be all of them look like that but one. If you compare the one on the right to that picture I linked you to, you can see the similarity. I've had colonies that had over a dozen like that, and one perfectly hinged one.
ps... if you look at picture 2 your may notice that the wax at the very end tip of the cell (left side) has bee chewed away. that is the undulation or wax texture you see over the remainder of the cell has been removed. this typically occurs at about one day prior to the queen emerging. queens (virgin and mated) seem to pretty much ignore queen cells up until this time.