Probably, Tim.They are still 'maturing' even if they are not growing. They could mature simultaneously but the held back ones will not yield as well. This will be particularly true of plants exhibiting a phenological maturity response such as potatoes or cauliflower. Additionally holding back will impose stress on the plants which may even promote earlier maturity with substantial loss in yield- buttoning in broccoli or cauliflower, bolting lettuce etc..