I don't get all the clamoring for 1GHz.
Apple builds their phones for performance, and we know the performance will increase this year based on the competition. But a figure like "1GHz" really doesn't mean much when you're talking about an iPhone. Apple builds the new phone with the software and makes it perfect and an industry leader, they wouldn't release a phone that doesn't have on-par performance with the market, and Apple is a company that does not make phones for a spec sheet.
You might see HTC, Samsung, or LG making phones with crazy specs that would be unneeded with proper hardware optimization, but that's because they want the purchases from "spec sheet buyers".