I came across a blog from a few years ago that said virtual servers can't run as fast as their host hardware. Is this still the case today?
I came across a blog from a few years ago that said virtual servers can't run as fast as their host hardware. Is this still the case today?

I don't know what you mean by 'as fast as their host hardware', but virtualisation creates an abstraction layer. This creates overhead. Parallels Virtuozzo Containers advertises overhead of ~2%, and Hypervisor has overhead of ~20%.
Shane.
Basic Linux Hosting on classic platform; Parallels Plesk Panel 10.3.1