Does how quickly he responds to your text mean anything?

If a guy answers a girl's text quickly would you say that its a good indication of his interest in her? For example, the last couple of times I've texted the guy I'm interested in he has responded in less than a minute. I barely had time to get my finger off the send button before I had a response. Does that mean anything or is it more likely that he's bored, sitting by his phone and has nothing better to do than to text me back?