Originally Posted by davegold:
“Darcy is marking a touch tougher than Len this season. It's what a lot of people have been asking for but it's no surprise that some people get annoyed when she marks up, some people gets annoyed when she matches Len, and now people are getting annoyed when she marks down.”
She didn't mark Danny down.

She gave him a 10 for a dance with bad footwork.
I think she'd decided to give him a 10 because she likes him and tends to favour the male contestants anyway and then had to find a reason to justify it once the other judges had commented on the footwork.