I've been using the Pro versions of your plugins on a few of our sites but I don't seem to be getting very tangible results when I then run our websites through tools such as Page Speed Insights.
I've done the following with smush:
Bulk compressed and super smushed the images
Converted the images to jpegs for lossy compression
Put images on the smush cdn
enabled lazy loading
attempted to smush images in the directory
I've done the following with hummingbird:
enabled page caching, browser caching, gravatar caching, rss caching
enabled gzip compression
fiddled around with the asset optimisation but didn't want to dive into it to much in case I broke something
I've recently tried to move the majority of CSS files to the footer in asset optimisation, but when I look at the Network tab on Chrome developer tools, all the CSS files still appear at the beginning of the waterfall.
I was wondering if you would possibly be able to offer any insights into why this may be the case.