Unfortunately, the NoSQL people come over as if - and many actually do - believe that RDBMSes are utterly useless now that they have found Je- err, their new toy.
Of course what is now suddenly known as NoSQL has it's place - hell, how many of us haven't been using Memcached or something similar? Mozilla (and many others) uses RDF stores - yep, that's also NoSQL now. It's just not the ONLY solution, let alone always the BEST one - and of course you need to pick the right tool for the job.
There's been a kentering, fortunately - and the more moderate and/or smarter specimens have retconned NoSQL to mean Not Only SQL. Still pretty obvious where it came from, but at least that's an acknowledgement of what life is like in the real world.
I have no problem with using NoSQL or whatever tech where it's appropriate. Almost all our sites have memcached fronts. We've been using Redis and AWS (ZOMG! Cloud!) for specific high-burst things. We've got a Cassandra (although I question if that was the right choice for that bit...) and we're going to be looking at MySQL Cluster (which, yes, is also NoSQL even though a regular SQL can also be used to question it).
I just have a problem with the religious conversion types who usually have barely a few years and one or two technologies in their fingers and suddenly need to convince the world that they've seen the light and so should you because pancakes.