NexTurf, FieldTurf...it's all the same. It's basically ground up tires with fake grass sticking out of it.
Still, I bet if you look at the normal amount of injuries during a year, it'd probably be about the same. Every year we forget about the injuries from the year previous.
I'm actually surprised that there aren't more season ending injuries by this time. It has been eight weeks, and we've only lost a handful of top fantasy players. Most of the guys who are hurt are going to be out for a few games, but at least they can come back.