I think that depends on the MMR of you and the others. I only played 2 solo shuffle last week for the weekly as a healer, and both times got paired with healers about 800-1000 MMR higher than me. In one we went 3-3, where I got about 240 rating, the other healer got 0. The second game was 1-5 for me, where I still got about 80, the other healer less than me. Can't remember the exact number. Seems to be a matchmaking issue, both the long waiting times, and that you were put into games with people with a lower MMR. Definitely something they have to improve.
Out of topic, though a bit related: Matchmaking is just as screwed in PvP pet battles, and there they would just have to assign a 1v1 without any constrictions on MMR. Games just don't open for a while, even if we're waiting with 4+ people in the list (tested with a few friends). If they cannot get a 1v1 / no MMR queue to work, something like 3v3 with multiple roles and MMR seems far off.