Below is an interesting quote from a recent article on Profy regarding the presidential candidates site layout effectiveness:
While Obama’s site is clearly much more popular since it is visited monthly by 4 times as many people as McCain’s one (2.2 million vs. 583 thousand), here we also see one thing where McCain performs better than Obama - and this factor is video. On McCain’s website videos related to the candidate and his plans receive a very prominent position right on the homepage - hence the result: despite of the much lower number of visitors, McCain’s site seems to be way more efficient in making people consume content there - the number of video views on McCain’s site is almost 3 times higher than that on Obama’s site:
JohnMcCain.com - 2,101,000 monthly average video views
BarackObama.com - 612,000 monthly average video views
Don't underestimate interface design and the impact it can have on user engagement. If the McCain camp had only put the same emphasis on online contributions as they did on video views....