Yeah. I wish Apple implemented that star-before-redirection thing and captured the rating. Then if you liked the app, your fake 5 star review would help them without having to actually write a review, AND you'd be getting honest feedback from everyone, not just a filtered subset.
I don't know why people write AppStore reviews though. If I like an app, I'll go on my computer and tell people via social networking. Typing out a credible-sounding review on my phone sounds like work, not fun.