Yes, the majority of JWs who I have interacted with have definitely been arrogant.
I don't know if that is just a quality that the Org is responsible for implanting in its members or if that quality is something that attracts the members. Probably both.
The doctrine and structure of the JW religion is all about elitism. The higher you go up the food chain, the more elite you become. Until you can drink the blood of Christ and join in his lofty perch. And the lowly members, the ones who are merely of the worker class with no special privilege, usually act out their elitism by kicking the dog - the worldly ones.
It has made me cringe when I have heard JW elders, with a grade school education, make derisive comments towards people who are educated professionals. I was working at a hotel desk one day when a herd of JWs came in. There was a newspaper with a headline about a judge on the front page that was lying on the desk. A fat elder, who I know didn't graduate high school, picked the paper up, read the headline and snorted, "Huh! Why would he want a raise? What is so hard about judging?" Snort snort and a big laugh. It took all my strength not to reach across that desk and slap him. I kept my mouth shut (one of the rare times) but I so wanted to tell him what a judge has for education and what kind of knowledge base he would have because of his years and years of studying and work. That elder had no business making fun of someone who could run rings around him as far as knowledge of the law goes.
Many times I have heard JWs poke fun at people who are educated and professional. Or better dressed than they are, or just not like them. If a person isn't a JW - they automatically belong to the scorn class.
The scorn of the elite. The arrogance of the elite. I have seen, heard and felt it many times. It isn't pretty.