Without specifically being in the situation, it's hard to tell. The author implied that when they had spoken on the phone, he indicated to Troy that he wasn't sure if he was ready to commit, and then received the "please return by Monday" email within moments. It seems yours was more of a "yes, we're interested" followed shortly by the email. Maybe it's just their standard practice to immediately follow up "the call" with "the email," but I can see how it could be perceived differently depending on the receiver.