Yeah, it's about 2-3 songs worth of time. 2.45 (the time the band claims they always play to, even though they seldom do) would be about 4-6 more songs. That's quite a lot of potential.

And off the top my head I'm going to assume a ton of bands play AT least 2 hours. Just face it and admit your Jonny boy has decided to use his injury as an excuse to not play long sets. Or interesting ones for that matter.