Why is it taking multiple requests to load a website?

Why is it taking multiple requests to load a website?

My client is having problems with their internet connection and I can't
figure out where the problem is.
The symptoms:
Webpage requests usually fail on first try, takes multiple refreshes to
load a site completely
Sometimes the sites load partially (no css, javascript, etc)
Ping test is just fine (no lost packets, only 55 ms)
I'm theorizing that it may be a DNS problem, but I can't be certain.
I ran Fiddler and got this response in Chrome:
[Fiddler] DNS Lookup for "get.adobe.com" failed. The requested name is
valid, but no data of the requested type was found
I ran 1000 pings of google.com, with this outcome:
Ping statistics for 173.194.33.33:
Packets: Sent = 1000, Received = 999, Lost = 1 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 52ms, Maximum = 291ms, Average = 63ms
No proxies are set up on the client that I am aware of. I'm going to try
bypassing all routers and hook directly to the internet connection and see
if that works.