PWC_chart for blogCEOs are, of course, ebullient by nature.

So it's no surprise that confidence about growth prospects is bouncing back as emerging markets continue to barrel along and even sluggish developed economies show signs of recovery.

What is, perhaps, remarkable is just how far confidence has returned. The latest survey of 1,201 company bosses by PricewaterhouseCoopers shows it is back almost to pre-crisis levels.

But how much should we trust the bouncing boardroom Tiggers? There are also plenty of Eeyores in Davos, warning about fiscal deficits, growing economic imbalances and the rising threat from inflation.