I think that was just an example they used to show the "+ <1 per 100" statistic was misleading. According to a ClearWave survey AT&T's average drop call rate is

I think that was just an example they used to show the "+ <1 per 100" statistic was misleading. According to a ClearWave survey AT&T's average drop call rate is somewhere between 4.5 and 5.5% so it'd be kind of shocking if the 3GS only drops 1% of its calls. So based on that the maximum increase in dropped calls should be 15-20% We don't know if it drops .9 less calls per 100 or .2 less calls per 100 or if the 3GS drops more calls than the AT&T average. It also disproportionally effects people who are in constant poor signal conditions. So based on this logic (which could be totally wrong I admit) it seems like most people aren't going to notice a dramatic difference in dropped calls. One extra dropped call per week, month? I guess there's no way of knowing.