Yes, the ex I called about 5 years ago did return. Not as a bf (mostly because I no longer wanted him as a partner, although we never explicitly had that conversation), but as a wonderful, reliable friend. So, depends on what you mean with 'return'. We couldn't be partners, too many differences in our lifestyles but since his return into my life (about 8 months later the breakup - although we never completely lost 'contact' when we are apart, as I often ran into him), he has been a solid presence in my life. Authentic friendship is for life. Romantic love, not so much. So, I'd consider this a return.
The 2nd ex I called about, no, didn't return, although he did apologize for his behavior (a year later) and, although not really close friends, we are now somehow friends (in person and on social media). But this was a much less strong and shorter relation than the first one.
Now, my latest relationship just ended. I never called psychics in the two and a half years we were together. It was a rocky relation all the time. I had walked out a couple of times but then he accepted me back. So, ex bfs may indeed return (but was a quite short hiatus, about a month both times). Until he has been the one to walk out. I have called some psychics but not to ask if he returns: I don't want him back. I only want that one day we may be able to communicate what happened without anger. I know it'll happen. It's not much what psychics tell us: it's what we truly want. And again, 'return' may mean different things.