Always worth to note:
DXOMARK sells test equipment and consulting services for (among others) camera tuning.
Naturally, they won't attack the image quality of a customer who purchased their test equipment and/or consulting service (usually not publicly known who did that), so they often tone down some of their statements when they review a device (and shift the attention to other areas).
Always interesting to check out the scores of DXOMARK competitors in parallel, e.g. VCX[0] which strives for an objective scoring scheme (but didn't test the device yet, indicating that they at least didn't have an early sample)
I don't know about smartphone sensors, but the DXOMARK sensor ratings for full-frame digital cameras largely mirror my own experience with them, so at least there they seem to be a fair judge.