SAMOLED screens need to drive all three subpixels to full in order to create white. So depending on how you use your phone, you can have great battery life or you can have horrible battery life. If you spend a lot of time playing games like Dungeon Hunter or watching movies like Fight Club, the dark scenes help conserve power since the darker the picture, the less the subpixels have to work. But if you spend most of your time surfing the web, and writing emails, the extensive use of white backgrounds will deplete your battery very quickly. Varying power requirements depending on screen brightness isn't an issue with LCD because the backlight is on no matter what the screen is displaying (which is also why the contrast ratio isn't very good since the backlight will cause blacks to look more gray).
The blue tint is probably related to the blue subpixel burning out faster than the others.
So it appears that blue tint is more or less on all SAMOLED screens. The question is, how many people even care? My co-worker's Vibrant is so blue it's unsightly to me, but he doesn't even notice.