I figured this had to be the case for some folks, otherwise it would have been fixed long ago. I'd be curious to know what your setup is. I'm running Mac OS Sierra on a 2013 MBA, connected via Comcast in the heart of Silicon Valley. My computer isn't a speed demon, but it's also not a slug. LinkedIn is by far the slowest website I visit with any regularity, and I have tried script blockers and such to no avail.