True, but you still may be waiting a month to get eggs from current layers as they get over the stress of moving to new diggs and having new room mates.
I would still try and find "chicks" 6 weeks or younger so they are still impressionable.
On this side of the pond at least, if you get females in the spring, you'll be getting birds that have already laid the first 6-8 months of their most productive time of their lives, which usually goes for 18 months or so before they slow down. The chicks you raise this year won't lay till summer, but will likly lay all through winter, while year old hens will take a month or two off in the winter.
Of course, your ultimate goal on chicken rearing will change what you might want. If pets only, then doesn't really matter what you get or how well they lay, if you want them for mostly their eggs, you'll want to plan on keeping them for about 3 years before replacing them for new layers. By the 4th, most will slow down to just a few a week.