not that hot. probably just mildly hotter than X11. it is likely that the miner is still not at optimum. i suspect some private miners are hashing much faster. perhaps even claymore is running a version that is much faster. no proof of course 
Hello dvdemecillo, great thinking you got there!Temperature is indeed a nice way to understand how close you are to optimal. If the temperature is far from "gaming temperature" then the algo not efficiently mapped.
As a consequence, the possibility of a much higher performance miner is indeed possible (albeit I cannot tell if "possible " is also "real").