I online dated for a little over 3 years before meeting DH. In my experience, people who were duds on e-mail were usually that way on the phone and in person, so after a while I realized if I didn't connect with somebody through writing, it wasn't going to progress. If somebody is really interested, I would expect to see an effort. For example, he could mention he also has Wii fitness, but prefers golf and isn't much of a Lionel Ritchie fan either, then ask you a few more questions about yourself. Just giving one line answers when you try to have a more in depth conversation gives me the impression of a lack of effort which would be a turn off. Also that guy could just be saying 'hello' and wanted to comment on your picture without looking to go further than that. Either way, I would not reply to his last comment because he does not seem to be making any effort to continue the conversation by giving more info about himself, making more comments on your profile, or asking you questions.
I also have resented times where I had to do all the talking just to keep the awkward silence at bay. I was chatting with one guy on the phone who gave one word answers and so I tried to fill in the space by talking. I jokingly asked if I talked too much and he seriously said 'yes'. I thought, "then you say something, don't just sit there like a bump on a log and expect me to do all the work".