From my personal experience, this is utter bullcrap. At my first real programming job in a somewhat large company, we were an Android team of 6 developers aged

From my personal experience, this is utter bullcrap. At my first real programming job in a somewhat large company, we were an Android team of 6 developers aged 20-25 (the 25 y.o. guy was the team leader) and one dude aged 40. It was very easy to get along with him, even though we couldn't really relate to the problems of having a teenage daughter. I wouldn't call these cultural differences problematic at all - actually having an older person's perspective on your team can be quite beneficial, young people are often too impulsive for their own good. Most of us were juniors facing our first professional coding gig. The older guy's experience was invaluable because he already knew a bunch of languages, had used lots of different SDKs and had made a ton of mistakes, so we could and did learn a lot from him. The only thing that struck me as silly was that he was a 'Junior Developer' by job title since he also wasn't experienced in the concrete platform, even though he could code circles around us newbies.