I have worked at many daycare centers, as a nanny, and now as Home Daycare Provider. Aside to what Judy has witnessed, the centers I worked at were awesome but one!
While I have to agree that the centers may feel 'cold', most educators find a way to warm up the rooms. We tried to interact with the children, and enjoyed it.
I don't like daycare centers, and would never send my own kids there just because there isn't enough one-on-one attention. Not every child will thrive in this kind of setting, some others do. I seemed to be stressed out at the end of each day, too many kids, and that many more parents!