I think anyone who uses a clicker CORRECTLY will have the same results as someone who uses marker words CORRECTLY. Having said that, we all have preferences and when one person may be good at using marker training, another may be better at using clicker training.
Personally I find it much easier to mark a behaviour with a quick "Good girl" rather than use the clicker. For reasons that I dont understand I seem to enjoy the training more BECAUSE i am getting emotionally involved, and as such, my dog picks it up easier. I found using a clicker helpful at first, but when you have distractions around, I think the dog picks up on your voice better than the clicker, although this is just my own experience, I cant speak for others.
Bottom line is, anyone who bashes clicker training does not understand the concepts of dog training, so you where right not to call this person back. sure you can have a preference in using marker words over clickers, or vice versa, but the principal is the same, and the dog needs to know EXACTLY when he/she has offered the correct behaviour, so that they can replicate it.
Maya, GSD Bitch, Born 30/08/2012..... complete lapdog.