Go back a few years and it was regarded as a fast rubber - almost one of the fastest around. But now as equipment technology has moved on it has moved back considerably on the speed charts (relatively speaking). Compared to tensor it is slower for sure.
Yep, Mark V is for speed gluing. About a year and a half ago I used this guys racket and he had Joola Mambo on it which is pretty similar to Mark V and Sriver. It was speed glued. It felt soooooo good. With the speed glue it definitely felt better than Tenergy. Without the speed glue, it feels like a slow rubber. And the sound it made was soooo good.