I agree, but how are they not going to be upset when (if) it's announced later? 8^P
What if it could be offered as an upgrade, aftermarket?
I've had my deposit down since April 2009. It was promised to be a 'fully loaded' Model S and the best of the best. If deliveries start in June and in July they announce a 500 mile pack coming out at the end of 2012 for example, I could see how that would upset some people. I wouldn't need a 500 mile pack but some might and others would simply want the top of the line and expect that to last longer than June to July.
I could see that as an upgrade down the road but don't think they'd announce something like that so soon. I don't think people would be that upset if 2 years from now they offer a bigger pack and also make it available to current owners. Most people realize they're buying a drivable computer basically and things get upgraded often. Some people will get upset at anything so they can't worry about everyone. I think the SuperCharger network is more likely. I think the next revision of the Model S will probably be after the Model X launch and will likely me mostly interior upgrades and maybe a new battery pack. This new battery pack could be offered to current owners as an upgrade but this is just my guess of course.