I think the problem here is that we don't have any physical evidence to reassure us yet. There are no in game stills, or game footage to at least show that Nintendo was warranted in how much power they picked to stick under the hood. Now if Nintendo plans to wait tell E3 to prove us wrong, then it could really be too late for many. Word like this spreads very quickly, especially around the net, and if this mentality is left to brood then people really will begin to think the system isn't up to snuff even when examples are shown to the contrary.
In fact, it's like the whole HD TV argument, with the number of people who own them yet don't watch HD channels. They believe the picture is better when watching regular television, even though it’s no different from watching it on a normal TV. Same thing applies to other products, like soft drinks versus generic brands. They might taste identical, but if there is a preconceived notion of one being better then the other, then this will effect our judgment. Much in the same way that if people are told that the Revolution will look just like the Xbox long enough, then they will dismiss the system from the start even if the real world examples prove otherwise. If anything, Nintendo needs to show that the games are up to snuff to at least convince them to try it out and hopefully get hooked on the controller, assuming it will be as fantastic as promised.
To make my overly long story short, having these specs released right now was actually a pretty bad blow to the Revolution unless Nintendo has a counter up their sleeve.