Yep, "too long / didn't read" has a negative vibe, it's both dismissive and a little insulting to the author of the target piece. Plus, it makes the person sayi

Yep, "too long / didn't read" has a negative vibe, it's both dismissive and a little insulting to the author of the target piece. Plus, it makes the person saying it look a little lazy or lacking the ability to focus and read through anything longer than a sound bite. "Summary: <whatever>" is nice because it is impersonal and provides a useful service to other readers. Here is a brief summary of what the piece is about. Useful and not impolite. (--btw, I'm the author of the "This Meme Must Die" article being discussed, Synisma)