In your area only perhaps.
Let's see around here:
FIOS will never be here, I don't even think there is FIOS for 200 miles in any direction.
Uverse isn't bad but nowhere near what Dish and DirecTV carry in terms of HD. Heck, they *just now* added the RSN in HD. Talk about being behind.
Time Warner? Did you say Time Warner? I have to laugh. There isn't a TWC system around here that is even half what Dish and DirecTV have. Heck, 2 of the TWC systems around here *just* went digital in the past 2 years, one of them has 10 HD channels and the other doesn't have any (with no plans to add any either). Charter and Comcast are no better. Half the HD channels at double the price. Typical of cable.
I don't know why people are so concerned about who is the "HD leader". Does the provider you have carry the HD channels you watch? If so then rock on. If not then switch. Or just wait a few months as they all leapfrog each other back and forth. It's the same old argument that's been going on for over a decade with SD channels. All that matters is *what you watch* and someone is always going to have channels that others don't have. So switch to the service that gives you the channels you want at the price you feel is fair, whomever that may be. It's really that simple.