The website @Grammarly claims that they examined professional profiles. These are the numbers from the infographic they sent me.
Anyone care to comment?
The top-rated profiles had errors rates of 1 error for every 6 words? HR People actually read profiles with an error occurring roughly every third word on average and still rated the freelancer 4.5 stars out of 5?
There's something statistically significant here; it's illegal in most states, though.
See the whole thing.
I agree with the basic premise that grammar is a necessity and stronger skills are positively correlated with salary and competence, but I can't accept that error rate.