A shoddy substitute

We have an electrician round right now - he's installing our Nest - and when I asked him if I could get him anything to drink, he said tea would be great.

Now this short story has two main points:

1. I love that, in this country, grown men ask for a cup of tea. 
2. I am absolutely terrified, in this country, when anyone asks for a cup of tea.

To me, making a cup of tea for a Brit is like trying to make a taco for a Mexican, or a curry for an Indian. They're the expert, I'm not. Fortunately, the English are far too polite to openly judge, which is helpful for my low-these-days self-esteem. Unfortunately, this also means I'll never receive the useful feedback that helps me improve my technique. Sigh.

Sort of related, we ended up at a BBQ join on Saturday night that had ICED TEA with FREE REFILLS. Never mind that it was £5.50. Hannah tried it and nearly spit it out - she couldn't believe I prefer tea brewed from bags on ice over Nestea. Am I correct in saying that brewed tea, either by hot water or the sun, is the gold standard and that Nestea is a shoddy substitute? Or am I misrepresenting the American South's iced tea culture? Help! This is important work I'm doing.