From your picture it appears that your room temp and cpu temp on average have a difference of 15degC. tot31's temps have a similar difference - but are quite difficult to fully interpret, as opposed to 1800 measurements averaged etc
I think tot31's temps have a slightly smaller room/cpu difference and keep in mind at a significantly high voltage. However, as he stated you are quite lucky as, even though the difference of yours is higher(and it would be higher at similar voltages) your actual temperature is lower.
You could be achieving better temps with watercooling. And if you plan to jack up that voltage, it might help your OC - especially since you don't live in sweltering Malaysia. For tot31, WC might be necessary to achieve decent temps, for you it might just help push that OC further, quite down that comp, and satisfy the true geek inside.