The answer to that question is "yes". In my experience what is it uncommon is to find a truly competent IT organization. And normaly the biggest it is the worse the problems are. But, what could you expect in an age where your IT group is composed with the cheapest guys you could hire with no experienced (and more costly) ones?. Or what about the clueless IT managers with little or no experience on IT?. They can't plan against what they don't know.
Yeah, as a colleague told me not long ago, IT life is nowadays like war: long periods of boredom punctuated by moments of sheer terror.