If you dont/didnt know the answer to your question you shouldnt have been performing. Thats one of the first things you should know before performing.
So you still have a lot to learn and should probably stop performing till you learn more.
If you are expecting everyone to be "master" magician before they perform I think you are living in a fantasy world. I personally do think you can attain mastery without performance. On one of Oz Pearlman's latest video blogs he states that he will practice a trick until proficient and then learns to refine and master it during his restaurant shows. I have heard several similar statements from Aaron Fisher and other big name magicians.
If you examine his original question he was asking what is the "Best" time to approach a table. He did not ask what is a "good" time to approach a table. To use a baseball analogy he is not asking "How do I hit the ball?" he is asking, "How do I turn a hit into a home run?" Most home run hitters hit their prime in their late twenties and early thirties...after an average of 6-10 years in the big leagues. Should Babe Ruth have been kept in the minor leagues until he was 26?
Telling a guy who has two months experience in restaurant work that he has no business offering Ted advice is a valid point. Telling a guy that he shouldn't be performing at a restaurant at all because he hasn't "Mastered" restaurant magic is an unrealistic expectation.
Thank you, couldn't have said it better, my advice may appear to be a ego boost of some sort but it most certainly isn't, it has logic to it: If you don't move glasses, you can't break them.
I'm not saying you can't move anything on a table but I, personally , think it would be wiser to ask them to move it. Now this advice can not be weakened by my experience because it's logic, plain and simple.