Which side of the example is Etsy supposed to be for that, exactly? They make a lot of changes, and supposedly do a lot of testing, but if you're actually paying attention to what's going on there (and the overlap between Etsy fanatics and people who know what TDD is are pretty small) they have constant stream of small problems. Many people I know who are serious Etsy users complain that the site changes too frequently, has tons of glitches and is confusing - most serious ones were overwhelmed years ago. Just thought I'd let you know since you're using them as an example of something.
No it doesn't. Well, I mean, sure, it does in the context of physics, but in regular English speed and velocity are pretty much the same thing.
On the other hand, velocity has a specific and well-understood meaning within agile software development, and that's what the antecedent post was referring to.
Of course, if you were just being snarky and implying that Etsy are completing plenty of nominal work without it resulting in any actual progress, then carry on :-)
OT, but you remind me of a joke a math professor made in a Calculus III class: A vector has both magnitude and direction, not to be confused with our university newsletter (The Vector), which has neither.
