i LOVE dream Bamboo- it is a wonderful batt- drapes beautifully- is great to stitch through- holds up to multiple washing/drying- is a very nice batting
as for the processing---all of the commercial batts go through some extreme processes- bleached cotton is not much different from bleached bamboo-
there are always going to be people who jump on every little thing- and (awefulize) it because it is different from what (they) use.
pick one up, try it out- and decide if it's a batt you like or not.
i have one kids quilt (goes everywhere-builds forts, goes camping, drags around everywhere 20-7) with bamboo batting and it is as nice now-4 years later as it was when new. i've not found any reason (beyond price) to not use it.