Veela reaction - any connection to strength?

[GKJPO]

No: HPFGUIDX 59264

I am (probably like most of you) re-reading GoF in anticipation of 
the big event.  

Harry reacted to the Veela the first time, but after that seemed 
unaffected.  He knew it was there, but did not show any 
susceptibility to it.  This is very similar to his reaction to the 
Imperio spell.  The first time, he was affected until he got the hang 
of it.  Connection?  Is this an indication of Harry's strength as a 
wizard? Also, does it bother anyone else that Real!Moody, the biggest 
Auror of all time, is so susceptible to the Imperius curse?  It's 
ironic that Fake!Moody taught the 4th year students about resisting 
it while holding the Real!Moody successfully captive with it.

Also, it occurred to me that JKR did not describe Draco's reaction to 
the Veela at the QWC - or, for that matter, to Fleur.  That's too bad 
as I think it could have been a good comical moment.  

Kristen (who just now noticed that Dobby has green eyes too - hmmmm)