Despite years of fighting with Drupal to try to speed it up, I've just never been able to get things going fast enough. We tried everything -- even paid for a second file server for downloads -- to try to handle the load. Never could do it. A few months back I decided to switch to WordPress. Here's the result:
That's out of the box. I'm using Vantage theme for WordPress.
Yeah. That's why I'm switching.
I've spent more money on WordPress than I did on plugins for Drupal (it's so easy). WordPress is so much easier to use.
The one disadvantage WordPress has is that it doesn't do multisite correctly, but I understand why. Whatever -- I can live with multiple WordPress installations, though it's not ideal. It's just so much easier than freaking Drupal. God bless you, WordPressers.