Creating Passionate Users: When only the glib win, we all lose is well written and illustrated (in the great style that Kathy Sierra always uses.
As with some of the commentors I think this matches personality types with Myers Briggs pretty well.
In particular I suspect that the key factor is Extraverts vs Introverts. According to the research we were told when I last took this there is a much higher % of Extraverts in the US than there is in the UK.
In the US something over 60% are extravert which puts the intoverts in a minority situation. If you also have a business culture dominated by the need for early closure (J in Myers Briggs) then you can easily see the glib being very powerful.
One area where I do disagree slightly is on the emphasis, particularly in some of the comments on improving the communication skills of the non glib. To me this sounds like the Extraverts telling the Introverts that to be heard you need to become like us. That does not seem like a good idea as then you get even more glib people, many of whom are struggling to be glib and therefore are not bringing out their best thinking. However, there are some useful strategies in there for increasing thinking time in there and for interjecting in slightly more introvert friendly ways.
Interesting to see this just after Sally wrote Eternal Echoes: Embracing what God does- living as a member of the Body of Christ which is addressing similar issues in Church life.