That cannot be correct because no manufacturer has yet shipped a laptop with any of the Haswell CPUs we expect in the MBPs.
There are laptops with the Iris Pro that are already out. I know that the new rMBPs will use a different model; however, I'm fairly certain that if Apple wanted those chips in July, Intel would've delivered.
Any thoughts on whether the Mac Pro will be released on the 22nd? Mavericks is ready for release, so they'd presumably want to release new hardware alongside it.