I do a lot of WP hosting and my recent anecdotal experience is that big-popular-named hosting service outperforms premium-tech-oriented hosting service. $15/month versus $125/month. I was shocked. Worked with premium service too, but they were not interested in delving. After 8+ years of being their customer.

Point is, for others — don’t automatically assume well reviewed premium ho$ting is what you need. It may, in fact, be a lot slower.