Over the past few days, I've been regularly getting text messages and emails whenever I arm/disarm my system. However, at 5:44PM I disarmed the system via the keychain remote, and 20 minutes later the text message still hasn't arrived. I received the email message within a minute, however.
This really concerns me as far as being notified when something else/more important happens with the system, and having to count on being able to access my email as a backup instead of being able to rely on SMS. I'm sending/receiving texts with other people just fine, I've just not received this one.