4X a week horse training... am I going to notice a difference in my horse?

Believe me Miracles can happen with in a Month! If the Trainer is a good one, you will know a lot of difference. but it sounds like, he may have just wanted to be lazy. don't worry the trainer will make it happen! so get out your riding clothes & be prepared to show-jump! just be careful & stay relaxed, remember he feel you tension! just keep a strong hand, arched back & gentle voice!