What a surprise that yet another thread on caraudio.com has been routed in to a full on ED Business Ethics Public Announcement.
You won't find objectivity on icix, but you will find it here because it isn’t a Nazi forum. Asking about ED on this forum is about like asking Peal Harbor residents how they liked the Japanese in the 40's. You're looking at around the same level of bias/misinformation.
Most of the things people say about ED are true, but a lot of it is 2nd or 3rd hand stories with some misinformation...that is what happens when you get the word out about a bad seed. The anti-ed crowd has some two digit, and high 3 digit, IQ all stars amongst their ranks. You've seen both of them in the thread.
I have always maintained that some people have very legitimate gripes with ED, and others have little more than a hardon for bandwagons. Again, this is nothing new.
With regard to the tangband, it looks to be very nearly the same driver as the ED. Identical? That I won't say, as without having the exact parts laid out, it's rather foolish to make such an assumption, even though at the very least the two drivers are extremely similar.
I find it unlikely that TB is involved with "stealing" or "copying" any designs from ED. I think it is likely that TB built a proto for ED, that much I think can be granted without much speculation being required. No one knows what agreements they may or may not have had together, so I think speculating about it is rather pointless.