Hi,
Yep honeymooning is when you start taking insulin and it sorts of helps your pancreas out and it starts to kick out it's own insulin again, it is temporary, some people have been known to have to stop taking insulin because the pancreas starts to do so well on it's own again, it can cause havoc as it's not always consistent so you try to work out your insulin doses then your pancreas decides to add some extra causing low BG's or you get used to dosing with your pancreas' assistance then it doesn't help and you end up with high BG's. Some people find it slowly trails off and they gradually up the insulin doses accocrdingly. Different for everyone really. For me it didn't last long and caused havoc so i was happy to see the back of it!
I also experience i mini one when i started the pump too, in the first few weeks i had almost prefect BG's, seemed like everytime i tested it was a perfect 5mmol. It soon dissapeared and i was back to tweaking everything all over again.