They interview around 65-80 each round. Depends on what the computer selects for that month. Of those about 75-80% go on to Phase II.
The mins on the website are what get you into Phase I. However, the selection process can be fine tuned by the company (in terms of hours, experience, etc.). I do know, across the board, they select the criteria and then ask the computer to give them the 135, 121, military, charter, regional pilots that fit those criteria.
If you're invited to interview, they want you. Those who routinely don't make it through Phase II have something in their background check that came up.
Hope this helps and happy landings,