The G2 definitely does glob. That's one of its bigger faults. (Others being that I, personally, prefer a line width between the 05 and 07 options -- obviously this is world-stoppingly critically important -- and that really old ones, I mean really old, tend to get disgusting sticky grips.)

Mostly they're just nice for being fairly rugged and reliable in a way most nicer pens just aren't, for carrying loads of ink, and for being ubiquitous. They're far from perfect. They're just... Good Enough™. And that's good enough!