Hi mikeyJ.c,

You're correct! The 72 means beats per minute. The song does sound slower than the 72 beats because you may be focusing on the strums. There are 2 strums per bar, and there are 4 beats per bar since it is in 4/4 time. So if you're only paying attention to the strums, it seems twice as slow!

I hope that explains it a little bit for you. Let me know if you have more questions!