Is this claim about attitudes as you die correct?

I don't believe you can die when in absorption (at least if you are reborn), but tricycle says > The attitude of the mind at death is very important, Buddhists > believe. The less fear and aversion we experience at death, and the > more focus, calm, and equanimity we have, the more likely we will be > reborn in good circumstances. Which is why preparing the mind for > death through meditation is a core element of Buddhist practice. Is there a reference for claims of their sort? If so, then how do we cultivate the right attitude, and does it really matter at all, given that results are about our own karma, rather than what happens at the end of this life or even one more life.