If you read the blog and read about the new blog post then you would know if you have not here you go!:
"The Content Team built the eggs individually; partly because each behaves differently and partly because the team was crunched for time and anticipating the potential for bugs. Isolating behaviors to each individual egg gave the team the flexibility to simply remove eggs if necessary, then re-insert the fixed versions without causing any disruption to the core gaming experience. This is why some of the eggs, like the Scale Egg and the Scrambled Egg, were released later."
So it is out stop saying its not. You can also read about it here: http://blog.roblox.com/2013/04/the-success-and-making-of-the-2013-roblox-egg-hunt/