Does adding more processing power increases Drupal Page Load Speed I have a site hosted on Acquia Cloud.all the unnecessary modules are uninstalled. The site has only couple of nodes (300 almost)and lot of imported registered accounts.
Below optimizations are enabled already

http://www.goodykitchen.com


memcache 
varnish 
CDN - Cloudfront 
Page Caching (Drupal's Default) 
CSS / JS aggregation


RAM : 1.7GB
CPU : 1 ECU

Problem:

My comparison site is bbcgoodfood.com in terms of page load. I have gone through some research and they are using most of above mentioned optimizations. Is there a way to find out why their page load is so smooth. OR should i just increase the Cloud size and see my site page load. (currently i do not have many users on the site)

any clues ?
thanks
APC might be your answer 

Best APC settings to reduce page execution time

There's a lot here on Drupal speed and performance generally ...