Well yes, but I don't quite understand your point. Regards the topic, are 3rd party exclusives more lucrative than cross-platform, of course if you're targeting a unique platform, cross-platform isn't a consideration. From a developers perspective, if you start with the mentality 'this is the game I want to create, what platform(s) will it work best on?' then you may find a particular idea fits exclusively to Wii or DS, or be more suitable for PS360. From the perspective of 'I want to make money, what platform(s) shall I create a game for?', which is more the point of this thread, then a platform's unique abilities are somewhat irrelevant. All that matters if whether you'll make more money on Platform A, B, C A+B, A+B+C, etc.I think the missing factor in your point on the Wii is that from day 1, before it was the market leader, it had a high ratio of exclusives which had nothing to do with momentum or market leadership. Part of that is GCN legacy, part of that is small investment in the actual games, part of that is not knowing the demographic, and part is the trend toward casual games that are shorter. Wii games, in more than one sense, are "cheaper" than PS3/360 games.
...etc.
In case the origins of the thread have been forgotten, I'll just remind us all that it came from the announcement of Epic Games title considering a new IP, and eastmen suggesting they should go platform exclusive because that makes more money. There is implied, for all the points you've rasied, a console divide between Wii and PS360 from the nature of the beast, and pointing to a large exclusive library on Wii doesn't really deal with the argument of how developers can court the most money for their efforts. It is also an awkward semantics argument - "there won't be 3rd party exclusives." "There will, look at the Wii." - The talk about 3rd party exclusives is about the PS360 market where there's room for crossover, and not the whole generation, for which you may as well include handhelds. Wii is something of the odd one out that we just leave to its own devices!