Lenses are on the up in the EU as well from just about all makers including Sigma and Tamron. Though Sigma seem to have risen more sharply than their rival.
Same on all mounts most lenses are up in price a few exceptions here and there but same story Canikon land too. Pentax have dropped a bit on some but that's because they had some utterly daft prices thanks to Hoya's cash grab over the last few years (fastest rising lens prices of any maker with ease)
There is some hope though with UK retailers unable to offer decent prices I grabbed a nice deal from One stop digital in Hong Kong took 4 days Fed Ex and they beat any UK price on a Tamron 90mm by a substantial margin (about £90-£100 odd) But deals vary that was one of the better ones. I know where I'm shopping now and it's not the UK they just can't compete