I cannot imagine how she could determine the strength of your muscles by massaging them?! Maybe you are more relaxed than the other people she worked on??
I really don't know what she was talking about, from the fitness program you outlined, you should be plenty strong, you should have challenged her to a push-up contest
I wouldn't let this discourage you, although I know it's hard not to listen to others' opinions. However, you said that you're feeling great and would have continued to feel great if she hadn't said anything right?
How you feel is far more important than the opinion of some random person.