We are more likely to get pious Catholics, not so much those who are inactive or who have lost their faith.
This is true...my own observation is that it seems the converts we receive from Catholicism are those who tend to be pious, 'not your average bear' Catholic. They often describe themselves to me as 'contemplative' or a similar adjective.
This is differentiated from many Protestant converts, who tend to be those who have studied history to a greater extent than your 'average' Protestant.
From other faiths, the Islamic converts we have here are largely from marriage to an Orthodox Christian. Jewish and pagan (Wiccan) converts we've seen are more from a Protestant viewpoint---they study the history and then make a decision. I think the same for former Buddhists and Hindus.
Just my observations, so far.