Quick question re: Lupin's resignation / Snape's potion

[potioncat]

No: HPFGUIDX 107564


> HunterGreen:
snip
 Someone once commented that the whole 'sugar makes it 
> useless' fact was really a lie Snape told Lupin (so he'd at least 
get the pleasure of forcing Lupin to drink something that tastes 
really  awful when it doesn't have to). I'm sure that's not true, 
but its a  funny thought.
> 
> 
> Tekay:
snip
> 
> "Professor Snape has very kindly concocted a potion for me," 
[Lupin] said. "I have never been much of a potion-brewer and this 
one is particularly complex....Pity sugar makes it useless." (PoS, 
156-7, US hardback)
> 
> Lupin seems to know how to make the potion and what the finished 
product should taste like. He's just not a potions master, so Snape, 
who is, prepared it for him.

Potioncat:
I've always thought this line is hints at ESE!Lupin. He "claims" not 
to be much of a potion brewer, but he knows sugar makes it useless.  
Although I'm not completely convinced about the ESE.