Hardly! The point of the graph is to show at a glance who has the most market share. Neilsen's graph doesn't do that at all.
If the problem is not showing all the information, then find a totally different type of graph. Or put them into multiple graphs, one showing the 4 biggest players, then an "other" segment. Then show another graph of the "Other" segment and show the proportions in that graph.
Agreed. The "manufacturer" dimension given that 4 of the 7 OS's only have a single manufacture. Pull out the manufacturer data, size the blocks properly and you have a very informative chart.
I really don't think that information which is legible but completely wrong is preferable to information which is slightly less legible but completely correct.
It reduces the amount of information? So you would prefer the wrong information instead? You're pretending OP tried to make a better graph, when clearly he only wanted to show the inaccuracy of the Nielsen graph. Are you trolling?