This piece is bullshit. Show me any piece of malware running on a non-jailbroken iOS device! Apple opening up their platforms would be nice for many reasons, but this is not one of them.
One point I'd raise is that we don't know how much malware might be available on the App store. Apple doesn't require source escrow. Smart malware authors might be able to fly under the radar for a long time under Apple's conditions, leading to a false sense of security.