It's not just New Yorkers, the ignorance about Texas and Texans is pervasive. Upon meeting my future father-in-law for the first time, he greeted me with a dismissive "Welcome to the big city". He lived in suburban Washington, D.C. at the time (population 632,323 including suburbs) and I lived in Dallas-Ft Worth (population 6,700,991 including suburbs- 4th largest urban area in America, and ten times that of Washington, D.C.)
Once when I was in consumer sales I was at a corporate meeting in Cincinnati Ohio. We all got into a heated argument at a bar one night over who was the most educated and spoke most eloquently. The conversation quickly turned from trying to out rhetoric each other, into ridiculing each other...There were many insults aimed at various regional dialects, even though most of us had worked diligently to lose the one we were born with. As the evening progressed, tempers heated up, and I found myself defending my use of the word "stuff" by quoting Shakespeare :
"We are such stuff as dreams are made on, and our little life is rounded with a sleep."
Every one's mouths gaped and their eyes blinked, like fish out of water. They didn't even know what I was talking about.
The media frequently depicts, stereotypically, Texans as a bunch of uneducated idiots (and our current governor, bless his heart! who can't debate to save his life-along with news stories about teachers being forced to teach creationism as a science, have done nothing to dissuade that) ....However, most Texans I know can explain to you the basic geography and climate of major regions of the USA, as well as quote Shakespeare. Like many states, we have coastlines, mountains, forests, rivers, and prairies. We also have 3 cities that are in the top 10 (in terms of population) for the USA, fabulous universities, museums, airports, art galleries, restaurants, corporate headquarters, telephones, roads, and flushing toilets - just like any place in the western world.