If I have a reminder for 9AM and I set the remind flag to 15 min before, I receive the iPhone Push Notification and email at 8:41AM. This happens regardless of the time I set it, the 15 min flag comes 19 min before. Is this expected behavior or a bug?
The reminder lead times are approximate, and you should get your reminder within 5 minutes of the time set. It is strange that I also almost always get mine exactly 4 minutes before my set lead time.