It all depends on who and how you're tweeting. Most marketers have other marketers on following and all they want to do is push out links to their products. My DM's are full of links to others products. If you're tweets are only going to other marketers, then you most likely won't get the converstions you're looking for. Although the mass tweet market is good for generating traffic, it's the "relationship" of your followers that will convert. The majority of tweets I see are from marketers trying to get you to their splash paged so they can get you on their list. This gets old real quick. The best results I get are from the followers that genuinely want to know what you're about. If they feel they can "trust" you, then you'll convert....