It's not quite that easy to quantify. S4GRU marks a site as complete when Sprint accepts the site from the OEM. That's when we find out about them. For all we know, most or all the red ones could be complete with all construction activity, but there is something preventing them from being accepted. And it could be something very minor.
It is entirely possible that a whole bunch clear all at once. We are not in the position to say that Sprint and their OEM's are behind schedule, or to what degree. All we know is the sites that have been accepted by Sprint to date, but were scheduled to be complete.
I have seen Sprint documents that say that they WILL NOT accept a site complete until the OEM meets every single criteria as outlined in the contract. Sprint's acceptance of a site marks when the OEM can invoice for the work. So Sprint does not have an incentive to mark a site complete if it is not 100%. Once Sprint releases payment, they have nothing to hold over the OEM as incentive to go back and take care of anything that may be subpar.
Robert