While I'm not really sure how you read my posts and came away thinking I was solely talking about myself and not the general public, I personally don't care about thrill rides unless they're heavily themed. Physical thrill alone doesn't do much for me -- neither USF or IOA have much I care about (most of the non-thrill rides are mediocre at best), and EU doesn't look to have an especially great attraction lineup either.
Regardless, I think it would be hard to look at all the data and think anything other than EU seriously hurting USF for split trip visitors. While I don't have any trouble believing there are people who like USF more than IOA or any of the Disney parks, the information we have says those people are a minority (and probably a relatively small one).
Universal is aware of this and knows they need to spend significant money on USF going forward.