It's also subjective Allen and depends what games you're playing....I moved from a 7970 to a GTX 970 and got a hefty performance increase - however a GTX970 is still on the limit at 1440p if you're wanting to max all those settings in the latest games. Your typical BF4, Witcher, DCS, Arma are really pushing the 970 to its limits and that already has a 30-50% performance increase over the 7970.

I can see some of the advantages in the new Polaris cards, especially cost/bang for buck but at the same time I do see a lot of comments about market share and sales figures....the only issue there is that they're great if you're selling these cards yourself or if you have a stake in the company - as a simmer/gamer sales figures aren't going to help us or provide extra performance in the short term.