I often see various presentations. At most they are created by a small. What I noticed is that unless it is meant to be announced, there seems to be a difference in presentations. Some presentations look really smooth, but substance wise they are lacking (you cannot tell due the amount of time spend on the presentation). The presentation by Michael Meeks is more like what I value more: focussed on details, but the resulting presentation is not as smooth (things like different font sizes, too many colours, too much text, more difficult to follow structure, etc).
It does not really matter if there are lots of guidelines, templates, etc. Often the nicest looking presentations are lacking content wise.
It would be nicer though to have the combination of good content as well as really nice presentation. But if it is just one person, give me the inconsistent presentation any day over something smooth but lacking (if the presentation is smooth, make sure to be critical and ask loads of questions :P).