I was taught (and I think it is popular to do so these days) to use the isosceles. However, I find that when I practice for a sudden attack that I tend to naturally go into more of a modified Weaver, perhaps because I used to do fencing, where the idea was to present as small a target as possible.
So my question is, why the isosceles? I understand you can get better stability, which is great for practice or competition, but what if your target is shooting back at you?
The other thought is, though you are presenting a broader target, your vitals might be safer with an isosceles stance. Right-handed Weaver leaves my left side (and thus heart) as the place most likely to be hit. Puncturing one lung (with isosceles) might be better than puncturing both or even your heart.
So any thoughts on that?
Isosceles: greater chance of being hit, but a hit is probably less likely to kill.
Weaver: less chance of being hit, but a hit is probably more likely to kill.