I know one thing it did do was piss off a lot of the people who are super hard core into the EU.
I never really got into the EU, except for the video games. I did read the first three Timothy Zahn novels, and I didn't really care for them, so I never got into the EU.
Star Wars fans are quite an odd bunch and they are all over the place.
I'm somewhat of an odd duck myself, because at the time when I saw Empire Strikes Back in the theater I was mad, and couldn't say I liked it. I was only 10 years old and to end the film on a huge cliff hanger, and the possibility that Obi-Wan lied. It overwhelmed me, I wanted to hate the movie. It was only later that I began appreciate it, to where I can now confidently say it was the best Star Wars film made.
For those of us who were around to see the originals in the theater, the later generations have no idea how painful it was to wait for three years after the end of ESB to find out what happened to Han, and to find out if Darth Vader really was Luke's father.
I mean they spell it out pretty clearly in ESB, but there's a reason Luke has to ask Yoda in ROTJ, to get confirmation, because kids like me refused to believe it.