I have a RIR that has been laying for about 3 weeks now. She started 20 weeks and 1 day. She has laid EVERYDAY since then! My same age silver lace wyandotte and production red didn't start laying until last week at 22 1/2 weeks! Plus the SLW has been a better layer thus far, 3 eggs. I have only had one egg from my Production Red, slacker!
Here are some pics of my RIR. Bought her from TSC during chick days.
These were taken today, and she is 26 weeks old.
She's been laying since she was about 22 weeks.
Hope this helps you with your comparisons.
I assume my girls are production reds, though they sell them as RIR. My 2 with large red combs just started laying this past weekend. Going by ship date to the feed store I am guessing they turned 20 weeks just this past weekend.
This is "Big Red" 20 weeks started laying Friday:
Here is "Little Red" in the back (with the red comb) who started laying Sunday. In the front is Io, who is not laying. I think she has a little time yet.