What is most interesting to me is how Snape handles being offended. Snape has been portrayed in this FanFic as being extremely shrewd and self controlled. Harry even made observations along those lines himself, upgrading his respect for Snape considerably.

Snape (quite rightly) downgraded his trust in Harry's cunning. I wonder if Harry downgrades his respect similarly. If Severus had the cunning of even the 11 year old Malfoy he would not 'never talk to Harry again". Any benefit that he could hope to extract from Harry is still there and Severus is enough of a political agent to work past some offence when given a few months to cool down.