I don't think you did anything that requires an apology. When I read the thread I did think it was a poor choice of words to say to a bunch of yorkie lovers but it's not that big of a deal. People have weathered much worse than that here.
Just know if you ask for opinions, you are going to get them - good and bad - especially when it's about showing or breeding but you can also learn so much here. You just can't be a sensitive wimp about it.
Best of luck.