Sorry guys I am stuck in hospital (yet again...!) with limited access...
I was complaining not so much about the wording of the statement but the fact that it is there at all speaks volumes about our namby-pamby society.
Fair enough third parties labelling their food as hot because you don't know how hot it is as you did not prepare it.
But in the case of home heated foods, you DO know. So you don't need to be told by the manufacturer that when you take it out of the oven it is going to be hot, to whatever degree.
On the science side of things, the sugar in the pudding is essentially sucrose in solution which has a higher bp than water and the more moisture that is driven off, the higher the bp becomes.