Ours was done within a week or so of paying our initial $2k deposit. We were then provided with a copy of the results via the land developer and they also sent a copy to M. The results were referred to as "Preliminary Soil Report" so I'm not sure if M will be doing any more before or not??
Our SC has told us they use the prelim soil report to give a more accurate idea of required costs for siteworks, footings, etc.