I've got regular silverfish in the bathroom, but gray silverfish (or paperfish as they are called here) in the rest of the house. Those things are larger and much more destructive, some found their way in my collection of sheet music… They literally eat their way through paper and even damage untreated wood, nasty critters. And worse, where ventilating your house helps against silverfish, it only seems to create even better living conditions for those buggers. I'd trade for house centipedes happily.