No, becasue halo 3 had bad graphix yet it still sold more than cod4 on the xbox

Yeah, but that is directly comparing static sales numbers. If you compared those movies, cars, and computers to similar computers in the same price range, released at the same time, with the same marketing and hype, it might help you determine which of the two consumers would pick assuming all things are equal.

Again, static sales numbers are an indication of nothing but popularity. Comparitive sales of very similar products can help you determine which has great value, and in rare instances, quality, in the eyes of the most consumers.

Ironically, PS3 vs 360 for a moment, approached the line of sales being a factor in helping us determine value, if not quality.

Don't many people, everyday, on this forum claim that the quality of the PS3 along with the quality of its library will help it come out on top of the 360 in the end? Aren't they implying that quality can help or hurt sales, and thus, sales can in rare instances be an indication of value, if not quality?

To a small degree yes. But chances are if you keep buying games based on others' choices, you're bound to be disappointed ever so often.

Graphics don't make gameplay. Are we forgetting the PS2 had the worst graphics last gen. Yet, still sold the most software?

What if games have the exact same hype, marketing, release date, platform, and IP recognition? Then, would percieved quality(reviews) potentially be a determing factor in sales?

It had the highest quality, and I submit that said high quality of library had a small part to play in its amazing sales.

The Gamecube/Xbox ports had better graphics, but the PS2 versions sold more.

I think we're talking about two different things. Don't misunderstand me. I'm discussing the PS2 hardware. I'm saying that library quality had a small(or large) effect on sales of that hardware. Software quality between platforms can't use sales as a factor in opinionating said quality, cause the userbase and thus audience is different, and again, using sales as a factor for software is absolutely relative to other very similar software on the same platform, with the same hype levels, ect.

To a certain extent.

If it was last gen, Playstation had a better brand name. The Playstation name had the most hype. Wherever the flock of sheep go. This gen, the flock went to 360 in the US.