Well, I have a problem with this. If the doctrine of Irresistable Grace is true, then it is impossible for the regenerated man not to repent. And it would be impossible for him to perish. And why would God be long-suffering? God can cause a man to believe any time he wants to if your doctrine is correct.
Now, on the other hand, if "us-ward" means all men or all mankind, then this verse makes sense. It is showing that God is being as patient with the unsaved as he possibly can be, giving them every chance and opportunity to repent.
And scripture shows this.
Rev 2:20 Notwithstanding I have a few things against thee, because thou sufferest that woman Jezebel, which calleth herself a prophetess, to teach and to seduce my servants to commit fornication, and to eat things sacrificed unto idols.
21 And I gave her space to repent of her fornication; and she repented not.
22 Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.
Here the Lord said he gave Jezebel "space" to repent but that she would not.
Now, this completely contradicts Calvinism. If God wanted her to repent (which he clearly does), he would simply regenerate her and she would have repented.
And notice in verse 22 that God has not given up on those who commited spiritual fornication with her, but God is still offering these people a chance to repent.