I have noticed lately that Twitter has been a little slow especially during "Retweets". The reason this could be happening is because Twitter is testing some new "Search" features on limited users. I always found that Twitter was missing a "Search" function on the main webpage. If you are using TweetDeck or any other 3rd party application they have a "Search" button which is why users are using these apps more than the actual Twitter website. Finally Twitter looks like they will be rolling this out soon to all users. It will also have a "Matching Users" sidebar and also a trending topics section. So you can now see what the popular tweets are at any given time. Twitter is making these changes just at the same time Facebook is changing the look of their site. Is this a coincidence or just great timing? Time will tell.