Rare Earth Update
Another study using data from over 100 solar systems postulates that there may be > one way to form a solar system with our way being a definitive minority. These other systems with superJovians lurching in elliptical and close orbits likely do not have rocky "Earth-like" planets.
I'd speculated that this might well be so several years ago based on limited data. As more data has been gathered, the rarity of Jupiters in circular orbits out 2-5 AU becomes more pronounced. Instead we get lots of drunken fat Joves lurching throughout solar systems with a penchant for star close orbits.