No, it's an effect. Lego bricks don't come in that many colors. The effect is called something like "tile" or something. Again, I'd have to mess with it, but I can do it.
EDIT: Did my research. It's actually Mosaic, followed by a Sharpen filter, plus a pattern overlay that I nabbed from that image. Check it out:
EDIT2: You know, now that I look at it in more detail through photoshop, it actually appears as though that was done in actual Legos. What's funny is that after refining my method a bit, I actually think it looks more realistic than the actual photo-capture:
