When Grant or Brent have spent a summer commuting in 90 to 100+ temps and a winter of riding in below 0 weather, I might give more credence to their advice on how to dress. And if they prefer ride at a slower, more comfortable pace, that is fine by me. But I *want* my commute to be more high-intensity. I like that my last BP reading was 106/70 even though I'm pushing 50.

Here's my advice: Wear what works for you and ignore those that are trying to sell you on certain products or on a point of view.

Many, many people have success wearing just whatever they'd wear to work. Others prefer to wear athletic or even cycling specific clothing. Neither is "wrong".