EBS is a very unreliable service compared to the rest of the AWS stack; probably the single most unreliable service. (vs. EC2 which overall is fairly reliable, even if individual nodes aren't, and Route53, which has been quite reliable.)
Load balancers are often used as part of an HA system, so building your HA component using the least reliable subsystem is a bad idea. Particularly because there's no need to -- the S3 backed instances work fine for this.
Load balancers are often used as part of an HA system, so building your HA component using the least reliable subsystem is a bad idea. Particularly because there's no need to -- the S3 backed instances work fine for this.