I tried 4 times to leave a new comment, but the site keeps crashing. Strange. I tried 3 times with the HN link, then switched browsers and tried on a fresh link. No go.
I'm finding lots of people begging for invites. Very strange business model. Show something cool, then prevent people from signing up. Many of the comments I've browsed are some pretty pissed people.
"Four score and seven years ago..." - the sentence is very hard to read.
"all men are created equal" and "we are engaged in a great civil war" - passive voice.
And so on...
The moral is that you should not trust an automatic tool to judge your writing style.