I don't think it makes much sense to argue with you about it, but let me tell you this much. Increasing the number of leaf connections from 3 to 6 increases your search horizon only by some 30%-50% because each of the hosts you are connected to will probably search the same set of hosts.

The reason searches would return more results was that the pre 2.9.x network was so overloaded that many searches would be dropped before they could reach the whole reachable network. With more connections the probability of one search surviving long enough to return more results was just a little greater.
Since LimeWire has reduced the traffic and the number of dropped searches, there is no need to increase the number of connections anymore because you will always be stuck with the same set of searchable ultrapeers +/- a few dozens.

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Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob