This could simply be Murphy's Law having it's way with me like I dropped the soap, but it's still something I've noticed with alarming consistency.
Out of 5 games I just played, I encountered the AI3 Time/Aether deck 3 times. Each of those three games, it brought out Fate Egg about 4 times each (only 3 the last game), and every one of them turned into something eminently useful to the AI. They were all high damage nymphs or nymphs whose abilities could actually be used by the deck. The final game, it was 2 bone and an azure dragon. They were never anything but nymphs or dragons.
I've only used Fate Eggs myself a few times, because they're terrible. I've never gotten a single creature with attack or hp above 2, and never one with a skill of any sort.
In the interest of actual problem solving, I really could just be imagining it, or it really could just be Murphy's Law aiming at me. But I thought I'd mention it to see if anyone else had noticed.
I plan to build a time deck around the Fate Egg and try to see what the odds of getting dragons or nymphs are. But, I'm not a statistician, so someone else will have to assess the issue and confirm or disprove it.