Evidence please. I know that my network provider has data on where I am right now and that they would be capable of doing what you say (given a court order, for example), but that doesn't automatically mean they actually are.
I don't trust Apple any more or less implicitly than my network so I make no comment on whether or not they are in possession of the data my iPhone allegedly collects.
Lookee here: A German newspaper made an interactive map of the location of a politician of the Green party who subpoena'd his cell retained phone location data and made it available. It's a very enlightening demo, IMHO (web-page in German, but self-explanatory: hit the 'Play' button and adjust speed with the slider to the right of it). Not only does it show his location over a very long period of time, but also when and where he made phone calls.
And I'd be really surprised if the US had less data retention than Germany.