Yes, there were big differences between the Ossis (easterners) and Wessis (westerners) that lead to misunderstandings and disapointment. E.g. any citizens of the GDR had wanted a more open and more democratic state. Both citizens and politicians of the FRG however expected quick reunification. Which was exactly what ended up happening roughly a year later.

By the late 80'ies most people on the east side of the "inner-german border" had been disilusioned with the pseudo-socialist economy of the GDR, which only managed to stumble on due to the FRG pumping billions of Deutsche Mark into it. The Ossis had swallowed all the western propaganda completely, expecting capitalism to be a wondrous economic system in which everyone was well-off. (Almost all of them could recieve western german tv.) Instead what they got was western companies coming in and dismantling what little industry there was. The economy basically crashed, as business either were bought and closed (their assets being shipped to the west) or were forced out of the market due to being wholely uncompetitive. Due to this, many Ossis decided to move to the west, if they were able. A much smaller number of Wessis came to the east, often because this meant a promotion they would otherwise not have been able to get. Salaries, workhours per week etc. were universally worse in the east, due to its economic weakness.

It's interesting that the eastern states became strongholds for the conservative christian democratic union. While still being to the left of the american democratic party, it is as far right as the major parties of the german political spectrum go.