I'm going to tell you my experience with my XH's "No Contact" but I don't think it really means anything because everyone's sitch is different.
My XH went for five months in 2006 with No Contact at all (no texting, e-mails, nada). Prior to NC, he was as mean and obnoxious as it gets. Then, 5 months later, out of the blue he called me late one night. He was crying and so remorseful for everything he had done.
I got several of these late-night phone calls. Our R started improving and I really thought he was coming out of it. Our R did a gradual healing for the next couple of years. But lately he has retreated again. His twice weekly phone calls have dwindled now to about once every two months.
I used to get my hopes up when he called regularly and acted more "normal", but now I don't have any expectations.