I have been there, and you have every right to! LOL. Although there's a bit of confusion for East coasters because what we call "lo mein" they call "chow mein" on the West coast!
I stole the below bc they said it much better than I could have..
The main difference between lo mein and chow mein lies in what happens to the noodles before they are combined with the other ingredients. In chow mein, the noodles are fried separately. Usually, the fried noodles are combined with the meat, vegetables and other ingredients in the wok at the end of cooking.
Noodles destined for a dish of lo mein skip this separate frying stage. In fact, the noodles may not undergo any further cooking at all: it is common to serve the parboiled noodles in individual bowls at the table and pour the other ingredients over top. Alternately, the noodles may be quickly tossed with the sauce and other ingredients in the wok before serving.
Since the real star of any lo mein dish is the sauce, it's not surprising that Lo Mein recipes often use more sauce than chow mein recipes. Frequently, the sauce is thickened with a cornstarch and water mixture before being combined with other ingredients.
Source(s): http://chinesefood.about.com/od/chinesed...