Actively participating in online forums as well as reading several blogs and 'authoritative' articles on various HR topics has reinforced my long-held opinion that much of HR is really an "it depends" kind of profession. When I have worked amidst large scale change efforts, conducted research and also written about change in organizations I find myself repeating the "one size does not fit all" comment frequently.
Often when various professionals jump into online discussions with their belief on a given topic you will see responses that are distinct from one person to the next. Some try to validate their belief with their reasoning as to why they act on those perceptions but often those reasons are the outcome of ones personal mental models and likely will not hold up under scrutiny.
Humans are an interesting species and HR professionals are no exception, the reality is when you are seeking a professional opinion on an HR related topic it is wise to read as many different opinions as you can find. Then check out the organization you are hoping to work for (or are working for if it is an internal matter) and see which of those opinions actually are in play at that organization. Because it depends and Rule Number 2 still applies.