While at B&B Motorcycles in Lincoln today I asked a Suzuki GB bloke about the new 1000s interval, mentioning that the original handbook has the usual 3,500 but an addition to the manual states the new 7,500 interval. What he said was quite interesting, he said the 'Vstrom owners club' had reps at the launch, and they wanted to know if the intervals were going to align with the competition, so Suzuki looked at it again.
He then added that the 3,500 intervals were never about oil, he said they were to check cycle parts, chain adjustment etc. brakes, running gear. He average owner, he said, cannot look after a bike for toffee, so to keep them in good running order they needed to see them every 3,500 miles, the oil change is incidental. This is why the new 1000 can go to 7,500, because they put the miles on the bikes and found that they can go 7,500 miles without the checks and adjustments earlier bikes needed.
He also said don't waste your money on changing the oil filters every time you change the oil, as long as they're genuine filters you can leave them on for 2 oil changes.
Make of all of that what you will, the message was quite clear to me.