The sole purpose of showing amount of bars is to reflect service strength, which correlates to phone connection. If service strength is not improved, but the amount of bar is added, then what exactly is the point?
A lot of us had zero bars of 3G most of the time. Our phone rarely went to EDGE, but it was just on zero bars of 3G most of the time and worked fine. They recalibrated it so that instead of being on zero bars most of the time, we would have one or two bars, to be more in-line with reality. I saw A LOT of people posting screen shots, before 2.1, on Mac Rumors that showed zero bars but on 3G.