True nation-wide coverage of LTE won't be until after 2014. Not to the degree required to support a phone that only works on LTE. There would be far too many coverage gaps. So unless you think there won't be a Verizon iPhone until 2015, any LTE iPhone would also need to support CDMA. And if that is the case, Apple might as well make a CDMA version now since they'll eventually need to be able to support that standard.
6/10/10 at 2:37pm