I have 3 that are 7 years old and have not had any eggs from them for at least 2 years. I recently lost my beautiful Mary Virginia, a 7 year old EE who was laying every other day up until a week before she died. I keep my girls forever so even though I don't get eggs anymore, I have flock wisdom...
My beautiful and sweet Mary Virginia is 5 and I get a blue egg pretty consistently every day. Right now she is moulting so she is laying about 4 a week.