I got some more hens 2 weeks ago; my others went the journey 4 weeks prior. Now is a better time to get point of lay as you will get eggs almost immediately. You get less eggs in colder weather and could be waiting a little longer depending on the breed if you get them the back end of the year.
When I collected my 6 Light Sussex, (4 POL and 2 chicks), I put 2 hens per box on the way home from the poultry farm supplier. When I got to my allotment to let them out..... there were 2 eggs in the travel box!! Eggsellent start I'd say ;)