C class IP's better ranking?



another question that i have for you all - I have a word press site which has a lot of images and content so this is my results from pingdom tools:
Tested from New York City, New York, USA on May 26 at 12:01:14
Page size
841.8kB
Load time
5.32s
Requests
65
Perf. grade
89/100
Your website is slower than 72% of all tested websites!

Do you recommend using maxcdn.com or some other service to speed up the site? Thank you!