I just sorta assume that they didn't see a good shot of him, since that picture doesn't have the best shot. XD If you actually look at his character design, his body/build isn't girlish- no moreso than Kuwabara's is- and his face isn't even that pretty. It's just the long hair, and that isn't too confusing.

I JUST LOVE THE FACT THAT THERE IS ALL THIS DISCUSSION ON ITSUKI'S GENDER AND THE OP DIDN'T QUESTION KURAMA'S. Since the Phillipines mistook his character for a girl for a huge chunk of episodes, a-apparently. ;; Also, the fact that there is this debate on whether Itsuki is male or feminine or what is lolarious to me when Sensui's the one who has a female personality, orz. XD GO GO YYH BRAINFUCK.