i dont think eggs have any magical powers is all. they are definately good fuel: protein,fat, & low carb. i dont know if its any better than plain ol cattle but its certainly no worse, and it certainly is better than a lot of other foods out there too.
as far as how many i can consume at once, ive never tried too many. i usually stick to 2 at a time max.
i also like to mix them into protein shakes to get extra protein+fat and i like the added thickness it gives to the overall milkshake.