Nope...they've been stellar layers from the start. I cull rigorously for laying and for the first few years they have to be a daily layer in peak season, after that they are allowed to lay every other day and I'll still feed them but they must be a layer. This past year is the first I've seen them slack off from that daily or every other day laying and they also started taking longer to recover from down times that are common for all layers, like molt, broody recovery or winter slow downs. That's when the culling started...I won't feed a slacker for very long.
That's why I was so surprised that so many on the Heritage thread are content with their birds laying 4-5 eggs per week and thinking that was good....in my flocks that better be an old bird. I'd never be content with a new layer only giving me 5 eggs a week, even a dual purpose bird.

Don't get me started on that topic!
There is way too much of the Form follows function stuff over there.