Make it socially acceptable to add an abstract (or a tldr) as the first comment.
Something along the lines of:
"""Can data driven customer acquisition replace metrics for underfunded crowdsourcing frobs? Article says yes.
Data heavy with some interesting observations nicely presented. """
Or:
"""Submitted mostly as an example of breaktrough frob design. Hoping for comments from someone knowledgeable on frobs and frosb.""" (Hi, keep it honest : ).
The rationale for not having an abstract or tldr is summarized in the faq :
"""How do I make a link in a question?
You can't. (This is to prevent people from using this method as a way of submitting a link, but with their comments in a privileged position at the top of the page. If you want to submit a link with comments, just submit it, then add a regular comment.)"""
This suggestion should work nicely along with this intent: you are free to add extra info but you don't get a privileged spot on top of the page.
(Edit: posting from mobile device, first version just to get it out)