If our attention spans are that fried, are we any better off than the hypothetical guy trying to fill out a government form?
It's a bit like taking someone's synopsis for what the Bible is about. You can't. You have to read it, experience it and parse it yourself or you can't really know.
Myself, I'm not going to pablum-feed you guys a over-simplified short form version of what I think I just read. Read it for yourself.
No wonder libraries are endangered.
When I write a fervent wall of text I think is worthy of reading in full, I don't put on a TLDR, I just pity the fool who doesn't take the time to partake of dense knowledge.
So, TLDR, it is the author feeling the content is lacking in a dense section of text more than the reader having a limited attention span that leads to TLDR's. I think.
There is no evidence that "feralchimp" (who wrote the TLDR here on Hacker News) is the same as "codacorolla" (who wrote the original comment on Metafilter).