I am typing on a WASD keyboard with White alphas, Light Gray num row, Dark Gray mods, Black function keys, and red arrows and escape key. All laser-etched by WASD. You can see my keyboard here:
The Black keys have really white legends and the Light Gray and Red keys have the darkest gray legends. The legends on the White and Dark Gray are indeed lower contrast. I think the images on the WASD website are pretty accurate. The White isn't quite as white as the video makes it look, but it is pretty white.
However, ABS White isn't PBT White, and that point has been covered pretty well above. For a Gray-on-White keycap, IMHO, they look fine. However, I would never put them next to PBT or double-shot keycaps of similar colors.
For white with bold black legends, try SP's Standard Doubleshot set here:
http://keycapsdirect.com/marketplace.phpFor lees money and more customization options, but with Laser Etched legends, design your own WASD keycap set here:
http://www.wasdkeyboards.com/index.php/wasd-v1-custom-keyboard.htmlI have both, and like them each for their own virtues.
Good luck with keycaps!
- Ron | samwisekoi