Sadly, in practice there appear to be many things wrong with DisplayPort. I’m writing this on a machine using a workstation-class graphics card to drive two high-end Dell monitors over DisplayPort. In some respects — starting with basics like what happens when you turn things on and off — it is the least satisfactory video set-up I’ve used in many years, despite being more expensive than the last several put together.
In my experience, for a 2560x1600 samsung monitor, DisplayPort works well. Admittedly, the cable seems to stop working after about 6 months, since I plug and unplug from my laptop twice every day, but a cable replacement works.
