It's probably not likely the 910 whould have the new maps, so I would say its a good thing you did order the maps. It's only $6 only which is pretty cheap.
you were correct
the 910 had the older map
it was so old it didnt even show my house or
my parents house (they built it 28 years ago)
but the new map shows both homes
i just did the update and it was very easy
thx to yall ... i read on here how to do it and everything went smooth