Their new algorithm is now putting much more weight on mobile compatibility than any other factor. I'm about to write an article on that fact, it'll start on April 27th.
I may have spoken out of turn on speed, yes it does matter, but AbanteCart passes all their tests. "rachelagboola" is experiencing something other than website response with the slowness issue.
While it is important to have a fast loading site, the speed at which it loads has little weight when compared to keyword structure, h1 structure and the keyword rich URL.