I don't think the lead time is order specific. I have ordered the C435. Suyama seems to be travelling quite often recently and that, together with an increase in demand, should be the reason for the longer production time.
I am glad that you like it! Hoping to hear from your impression soon. Based on my audition, the W10 is more mid centric (without extensions at both ends), the W20 is more balanced (the bass is crazily good though) and the W30 is more V-shape.
I have been waiting for my Fitear CIEM for 3 months already. Was informed by Jaben that I have to expect to wait for another 2 months.
So that makes the current lead time to about 5 months (or more).
I almost forgot that I have ordered the CIEM until this thread was bumped up once more.
I am on 4.4.2 With USB Audio Player Pro (without USB DAC attached, aka internal DAC) I am close to max volume. With USB Audio Player Pro (with USB DAC attached) I bypass the internal volume control. With HTC Stock Player I am on variable depending on the track and headphone I am using.