Client complaining about speed of website/system

I get this comment from my client last night…

“… couldn’t use it on an ongoing basis because of the speed. As you know I mentioned speed a couple of days ago. Attached [video] is my iPad 2, which is pretty fast, and very fast on the normal website and every other website. PCs are slightly faster, but [this new system is] still unusable.”

What are your thoughts on this video? I have have my ideas.