Admins do make the deletion decisions, they just do so
after "the
community" comments.
Admins make determinations, not decisions. They determine is there is
a consensus to delete, or if an article fits a CSD. Those aren't
decisions, since there is no choice. With a decision, you can choose
anything you like, with a determination, there is a right answer which
you have to try and find.
I think the more serious error in that paragraph is
that it says that
this situation is a change stemming from "a series of incidents".
Adminship is nothing new, nor is deletion or page protection. Even
deletion based on alleged lack of notability isn't all that new. It's
been around at least since the deletion of the 9/11 victims.
Adminship hasn't been around since the beginning, though. It was
introduced to deal with the increasing number of issues requiring
Jimbo (and a couple of developers) to intervene. The article is
correct, just rather out of date.