Sadly there is no understanding of grace and mercy.
And, of course, we must make sure that the Spirit must do absolutely nothing to transform the new believer. After all, it might make some of the others who have been sitting there all these years 'feel' badly about themselves.
How silly! Of course, the Holy Spirit is going to make changes in the life of the new believer -- some right away, some over time. It may be smoking, or drinking or sex or theft or whatever the sin de jour is. But the Good News is not just some legal transaction ("Call for an appointment"). Christ offers Life and that more abundantly. Necessarily, that sometimes instantaneously crowds out sin. And, aren't we glad it does?