Mandarin/Scooter and Frozen food

[doch]

Just out of curiosity, how hard is it normally to get Mandarin Gobies and Scooter Blennies to eat frozen? My understanding is that both are very difficult to get accustomed to frozen food, and yet I have one of each and they are now both taking frozen. Admitedly they're both picky about what they will take, but that's somewhat irrelevant to me. Essentially what I'm asking is have I just gotten lucky or is everyone else out there experiencing the same?