Maybe it is, maybe it isn’t, I wouldn’t want to work for anyone who expects one and I’m glad that me not sending one cements that. I also don’t do cover letters. A resume is already a summary of the exact information you’re asking for in the application (and going to make me repeat as if you never had a chance to see it beforehand in the interview); a cover letter is just another step, summarizing the resume. If you can’t take the time to even look through my resume, don’t bother, you’re probably too “high speed” for me in your “fast paced work environment” and I’m not looking to “wear multiple hats” to earn your paycheck for you.