I had meant to capture these reviews as they came out, but this community never sleeps. As such, I'm just using this article as a collection of links to the same outputs run through different models. This way, you can judge the results of apples-to-apples comparisons for yourself. Each model page already has gobs of examples of things working really well, so I wanted to put something out there that cross-references the same test for each model ... so, here we are.
Remember when LCM was incredibly fast? While some of these models may give you some coherent-but-a-little-blurry content at 4 steps, if they give back reliable images at 5+ steps, they went on the LCM list. A couple of them produce good images reliably at exactly 5 steps, but I had to draw the line, somewhere. So, for the purposes of my lists, Turbo = 4 steps or less. Your mileage may vary, so don't ignore these models. Maybe your magic workflow gets good stuff from them at ~3 steps. Leave a comment about what you did differently and I'll look into it.
Category I: True Turbo Models
Category II: Turbo Merged Models
These super-fast models can produce useful content in 3-4 steps. They can be used with the as-you-type turbo rendering workflow with just a little lag on a nice rig, but you can't really use them for a webcam or other truly real-time content filtering. Still, they often support higher resolution and styles that "True Turbo" cannot.
*I'm on the fence, here. I feel like this version is a bit worse at 4 steps, and I'm not sure it should still be on the "Turbo" list. I'm keeping it here because Alpha clearly produces good stuff at 4 steps, and Beta is just ever-so-slightly worse (to my subjective eye). We'll see what they ship next.
Category III: LCM Performance Models
These aren't "bad" models - just not as fast as the ones above.
*This is the other side of the dividing line. These models are okay at 4 steps, but 5 steps are significantly better. It is just a hair worse (to my eye) than the TurboVision XL Beta at 4 steps. If I move the "Turbo Line" to 5 steps, then I have this same issue with other models between 5 and 6. So, it is what it is: An arbitrary and subjective measurement between Fast and Crazy Fast. I almost want to give it to Blue Pencil v2 just for improving the speed so much.