It really is just opinion. That and you're comparing a glaring design flaw with the fact that things inevitably wear out with use.
If stating what I have seen is opinion, so be it. Again, why have you seen more cracked frames than Glock kabooms if just an opinion ?
What design flaw are you refering to ? The original delta ? The cracked frames I made referance too weren't the delta. They were .45 ACP.