Well, IAAA. There are no strong observational biases going on here regarding the eccentricities of the orbits of exoplanets. If anything, we're somewhat less likely to detect orbits in extremely eccentric orbits (but it turns out those are rare, anyway). It is a mystery why the planets in the Solar System are on nearly circular orbits when most of the exoplanets are in more eccentric orbits. Most of these planets are not much like those in our Solar System -- the median mass is 1.7 Jupiter masses and the median orbital period is 9 months.

These data were taken in the mid-infrared, where the contrast between the star and the planet is not as great --- only about 200--300:1, instead of 10^6--10^10 to 1 in the optical/near-IR.