Draco's potion making skills.

[potioncat]

No: HPFGUIDX 153136

 
> Magpie:
> Hermione doesn't get O's because she's a genius.  She gets O's 
> because she understands and knows the material she memorizes in 
> class and gets it right when it comes time to take the test (in 
this 
> school genius doesn't even always come into it anyway).

Potioncat:
That's right. A genius would get Os, but so would a bunch of bright 
and/or hardworking students. Some would get the O easily, others 
would have a more difficult time of it. (a bunch = vague number of 
students.)But in the end the score would be the score.

Back to Draco

I went to CoS to look at the interaction between Lucius and Draco 
about grades. At first, the way Lucius words it, it seems Draco's 
grades are not good. (Still, this is vague.)Then it quickly 
becomes "you let a girl of no wizarding family out score you in every 
test."

If Draco's marks were "bad" would he be compared to Hermione? It 
almost sounds as if his marks are very close to hers. Or Lucius might 
say, you let all those Mudbloods out score you!"

Like it or not, I think Draco earned an O in Potions.