Yes, the sales are down. The poor sets from latest Star Wars (courtesy of Disney) didn't help and neither did the unability to fulfil the demand for the latest Millenium Falcon UCS. While most were shouting "HOW MUCH for it?!?!" the others are still waiting to buy it 6-7 months after its release.
Lego was never cheap and never will be. But I'm ok with that. It's a "timeless" toy which I can take out in 20-30 years and it will not loose any of its playability value.