Unless you buy ATM connection, nobody is going to guarantee a minimum.
When I had DSL, they guaranteed a minimum of 128 kbps, with no maximum, and actually reliably delivered about 3 mbps. Plus, with my DSL I'd go six months or more without dropping the connection, so I could pretend I had a static IP. My cable reconnects multiple times a day, and they give me no lease guarantee, so my IP is constantly changing. And it actually costs more than I was paying for DSL.
It probably means that near the exchange, people get close to 6mbps...so there is a chance...
I could literally throw a baseball and break a window at the Comcast headquarters here, or hit one of the gazillion Comcast trucks in the parking lot. And I have no throwing arm to speak of. And I still have to wait like three days if I want a technician to come over. I would hope that speeds would be fast near their building.
If they don't care about a minimum they should advertize it as "up to" 6000 mbps, then you'd have really fast broadband (in theory)
They have different maximums to differentiate their plans. I have the cheapest plan, which tops out at 6 mbps (if you're lucky enough to actually get anywhere near that speed). They sell more expensive plans that have higher limits.
Anyway, I think it is bad to promote 6 mbps and not being able to deliver, and then just throw a "we don't guarantee a minimum speed"
Yeah, I'd be happy with just half that. As it is now, my wife is always complaining to me because it's not even half as fast as our DSL was, even though when we signed up they kept telling us how cable is sooo much faster than DSL. And every time we see one of those Comcast commercials that say how cable is faster than DSL, we just have to hold our tongues.
At first they used to tell me that it was my Mac that was making it slow, but then I got issued a Windows XP laptop from work and its connection is just as bad. And wired or wireless doesn't make any difference, and my LAN is fast, so I know it must be on their side of the router. That's when they pulled out the "no guaranteed minimum" excuse, and that was that.
Oh, and on-topic, I ran the update on my 2.0GHz Core Duo iMac and everything is fine.