The problem is we are interested in lots of different levels, if you put a typical range you wont get the best people. If you put a high number out you get every nutter in town applying. As a result we dont publish a range.
Neglecting to publish a salary range seems more like a negotiation tactic on behalf of companies of not wanting to be the first to name a number. Either that or you know your company can't compete on salary, which is my typical assumption when it's a company I've never heard of and I don't see a range provided.
Just me but I'd rather know salary up front and not spend an entire interview just to be low-balled. Wastes everyone's time.