Sure, context is really important, especially for a variety of different E3 events. I think its important to consider what Sony and MS were showing off that year too. Stuff like FF13 coming to Xbox, GoW being announced for the PS3. I cant recall these conference in great detail but it always seemed like the competition were just doing a bit better that year.
Well of course, but those were the big consoles that third parties were already putting their weight into, so Sony and Microsoft had more to show. It took until 2009 for third parties to actually take the Wii seriously but by that time it was too little, too late.