I'm not really sure it is a minority, or at least not as much as it may seem here on Hacker News. I recall reading that the GPL is by far the single most popular open source license. Can't seem to be able to back it up though.
Either way, something like 25% of projects listed on ohloh are licensed under the GPL, so its hardly a small minority of the free software community.
Several licenses are typically lumped together as BSD-like licenses, especially when comparing to the GPL. How about when the numbers for the BSD, 3-clause BSD, MIT, ISC, etc. are combined? (Counting the GPL is likewise combining GPL v. 2, GPL v. 3, LGPL, etc., I expect.)
That's an incorrect number. If you look at the open source code on the internet, it hovers around 47% to 48% (with a greater than 2b unique project lines sample.
About 22% are lgpl, though, so maybe that's what you meant.