McArdle said he would like to see My Gladiola strip a bit of body weight, but added the filly was in good order ahead of Saturday's race.
"She's a big heavy horse and looks like a colt," McArdle said.
"I would like her a bit lighter, but she seems to run that way.
"After the Cap D'Antibes, she was a couple of kilos heavier on the Monday than what she was before the race. They usually lose weight, but she put weight on, which isn't a bad thing at all.
"The Cap D'Antibes was chosen over other races to give her experience down the straight and it was the first time she had been away from Sandown or Caulfield.
"She did get a bit antsy when she first got there, which she's not like usually, but she settled down well, and it didn't affect her race day."
McArdle said My Gladiola was a Group 1 winner in waiting, but whether it's this spring or in the autumn, or sometime after that, he is unsure.
"A filly with a pedigree like hers, she's already worth a lot of money, but a Group 1 would make her worth stupid money," McArdle said.