Wheelbases are typically longer even if just a bit
If it were wheelbase alone that decided the handling of a bike you might have more than a tiny point.
they are heavier. A fat rider on a 29er is still heavier than on a 26" bike and the gyroscopic effects are there like it or not.
No. A fat rider on a HEAVIER bike is heavier than on a LIGHTER bike. Wheel size has nothing to do with that. Not all 29ers are heavier than all 26" bikes. The gyroscopic effects come when you spin something quick enough (probably not on tech twisty turny stuff). Then again – if you're not man enough to turn a bike…
The bmx comment is more narrow minded than anything. I like
my bike to feel like a bmx AND fit, which it does.
Narrow minded? You've just confirmed my point!
Proportionally, I believe 29ers make a better bike for big guys. If a 'mid range' height person wants a wee bike to fling around, they buy something with proportionally smaller wheels (bmx). It follows that as you get bigger, you'd be able to have bigger wheels (26") for the same effect. I know that, at 6'7", a 26" wheeled bike looks and feels, compared to my 29ers, like a bmx to shorter peoples 26" bikes.
29ers for big strong men!
Oh – nearly forgot – most 29ers seem to be built as XC racers. That would be like comparing a hardcore hardtail with a Scott Scale (but with bigger wheels). There are other geometries out there.