You have to turn some seriously wicked rpm's with a big crank and a heavy rotating assembly to hurt a 3/8" ARP 2000. Thats why most guys run them even to 10k+ rpm in "the other camps" as jason says.
Now, of course you will have failures, first, nothing is failproof- ask the guys who designed the titanic. Second, its really difficult to say for sure that bolt failures on a forum are not caused by installer error.
Generally though, for the RPM's most vw guys turn with the strokes we run and our small slugs- it just isn't worth spending the extra $$.
Most connecting rod companies buy bolts by the thousands to get a good price- for that reason it doesn't make a lot of sense to break up the quantities into various grades and such- 8740, 2000, L-19, etc- rather just stick with one.
8740, arp2000, L19, and Custom age 625+ are the most common ARP rod bolt materials, they have a couple others as well though.