I can't even remember receiving more than one delivery a day at home in the US. I'm not sure it ever happened there during my lifetime. I think that might have been part of the amazing turnaround time of email, where delivery might happen at any point during the day, and it's possible to reply several times over the course of a day to work out details for a meeting later that same day.
All of this is a long-winded way of saying that for the past month or so, I've been down to one delivery a day with my U of T email address. Well, not literally one delivery a day, but it can regularly take at least 12 hours for an email sent to it to finally arrive in my inbox. None of my other email addresses suffer from this delay. It's frustrating. Just this weekend, I missed an invitation to go play games at a friend's house because of it. I had to wait until this morning to reply to an email which C. had received last night. We postponed ordering TTT because the confirmation email didn't arrive until today.
Most of the time this email address works just fine, but if you're ever in a hurry to reach me, send me email by any other means, including my LJ email address. The Austen heroines would understand.