It's a valid concern, BUT Phade has already provided an answer in the Star Scale. That will contain any vid with even 5 stars and as we have seen over the year that vids come and go near the top every week. There's your answer. If a video truly is good, it'll remain near the top of the star scale and eventually climb in the top 10% list as well.
Also as Phade and Zarxrax have implied, a good video WILL make the list in time. Alan provided plenty of new vids that are near the top and from (then) unknown creators. There videos were good and thus stood against the test of a multitude of opinions.
This method may seem a bit harsh, but think about it, shouldn't such a list be harsh and be open to such procedures (esp. with how well it has been explained)? I think people are more or less arguing about the possibility a newer vid may not make the list, but that's a lot less likely than a bunch of vids "undeserving" vids making it. We already KNOW that happens right? This would prevent such a thing and shouldn't a video need to "work" to get there?
My prediction is that the list will remain fairly stable near the top and a few times a year, a video that is spectacular will continually climb to the top spots. This makes perfect sense compared to the way the old system worked where a vid could start at the top and move up or down. I don't understand why people would find it offensive that a good video has to work it's way up. That makes sense if it's a good video yes?
Also I don't mean to sound like ass, but there's no way to say it....let's be honest, how many videos a year truly deserve top spots like that? Again, this list is meant to be strict and harsh. We want it to be accurate yes? If that's the case, how many Right Now's, Euphoria's, Tainted Donuts, etc. come out in one year (and no I don't mean the type of video, but a video that just captures everyone in the community)?
If you HONESTLY believe you've been "wronged" by this list or something, then prove it. Get more opinions and work your way up there. It sure as hell is more valid (to me) than just popping up near the top and frustrating people who download the vids and expect it to be good. I for one used to not download vids on the Top 10% list with less than 20 opinions.
I don't think it's too much to ask to make the list harsher and more accurate. You guys are basically saying "OMG my video with 8/10/20/XY opinions isn't on the list anymore" or as Snhknives parodied "OMG it's harder to be good!!11" He obviously didn't mean that, but he did voice the biggest complaint, which is in reality, the reason the list exists. To highlight good videos to viewers. Phade's changes coincide exactly with that purpose.
And in the end, you guys do realize we're arguing about an interweb list right?
