Good article.
I've wanted to get a prowler for a while but don't have many options for using it.
Recently though, I've found that riding my bike has done wonders for aiding my recovery and produces very little soreness (sometimes even 'curing' the soreness it seems). My guess was that it was because it's similar to the prowler with a lot of concentric work and very little eccencentric (I'm not clipping in, just basic pedals)
It was nice to see this more or less confirmed by the article. I think cycling can be a good compliment to lifting if done in moderation.
It's funny to try and explain the concept of soreness to people though. It's become ingrained in people that you need to confuse the muscles and the soreness is some sort of proof that they're doing this. When I explain that you can train hard and never got sore, and it's a great thing, they never believe it until they try it.