If you assume they ship the same HS with the 2500+ as they do with the 3200+, then it's possible if you can leave the voltage at stock, have good case airflow & the ambient temp. is fairly low. quite impressive all the same.
Never bought a retail Athlon, so I really have no idea how good the HSfs are myself, but they'd have to give a maximum of 50C in cold climates or they'd simply be insufficient in hotter parts of the world. generally if the ambient is 10C hotter then so will your CPU temp be, more or less.
<font color=red>Those of you who think you know everything are annoying to those of us who do.</font color=red> :wink: