Is that Power Cycle thing legit?

Don't know which type of modem Comcast supplies. But there are types (usually the cheaper ones) that need to be rebooted manually after getting new settings from the ISP. So yes, if they tell you to do it, then do it.

Hmmm. I don't know about how important it is to do so regularly, but it is not a terrible idea to reset any electronics device on occasion. Routers/modems should be unplugged (some people say for 5-15 seconds) once in a while or if they start giving you connection issues to resolve issues with some of their firmware, but it shouldn't be too often (once a day is probably too much), though I'm not familiar with Comcast's models and how they work. If Comcast is updating settings or pushing firmware updates, then it would make sense that it needs a reset, but "Power Cycle" probably is just marketing BS-speak for "unplug it and plug it in again".

It can be. ADSL modems adjust their speed depending on how good the connection is, so a refresh can force it to recalculate the speed.

Its legit, had to do it myself in January for the new speeds to take into effect.

I used to work for an ISP and a simple power cycle can work wonders.

There are various reasons why you would want to cycle your router. Here are a few:

1. You have an older model router that needs to be renewed every once in a while.
2. Your router has had a firmware update and needs to be cycled.
3. Comcast has upgraded something within their system and your router needs a "reset."

Yeah, might sound weird for someone who is old enough to remember the REAL floppy discs, but it's legit, if you change your connection speed, your modem will most likely need a reset. And as it was mentionned before, it also helps whenever you have connectivity issues.

I think their biggest error there that makes it sound weird is the fact they called it Power Cycle. If they just had called it a reset, I'm pretty sure you wouldn't have doubts about it.

Ok thanks all. I've had issues with their tech support in the past so now I doubt what they say. It's like a Dilbert cartoon. They don't listen to what I''m saying and just say what's in their script and what they tell me to do has nothing to do with my problem. They might as well say jump up and down 10 times in a row, or rub your belly while patting your head.