As I understand it, all cars come from the factory set up for the long life servicing - so with the proper oil in for that and the service indicator set accordingly. The first user should get the service intervals set to suit them, which depends on their annual mileage etc. so to say the servicing was set up wrong at the factory is not true.
What is your annual mileage? If it is over about 15K, then long life servicing may be best for you. Personally, I prefer to get the oil changed etc. at 10K'ish, but that suits my mileage anyway.
I'm not familiar with the 5 year servicing plan, but they usually allow for one service a year, so you wouldn't lose out, getting it done now.