Also any idea if your folks are ever going to let people set RDNS records for their IPs? It has been requested but no one at GCE seems to communicate.
If Google doesn't have configurable RDNS, they're not a "one-stop shop" for all hosting needs. For example, a customer wouldn't send transactional e-mails from a server at Google because the lack of RDNS would affect deliverability.
Moreover, (sadly) your example doesn't hold anyway: sending email is actually something all cloud providers try to avoid (SoftLayer in Brazil lately is the notable exception). So getting anyone to whitelist your smtp and other ports is usually an unpleasant experience.
Last year Microsoft also announced Azure support for reverse DNS entries. So I would anticipate Google getting on this "bandwagon" fairly soon too. Just my guess though!
We've got Persistent Disks aka PD (logically similar to EBS / network storage) that come in both a "hard drive" variety and an "ssd" variety, as well as local SSD.
I assume you're talking about one of the PD products, most likely PD-SSD and comparing to one of the EBS offerings (either the new one or a piops one)?
If so, unlike traditional EBS, PD scales throughput according to disk size [1]. You get 30 IOPS/GB up to 15k or so. As far as latency goes, what instance were you testing on? Your VM's I/O competes for cycles with your vCPU (this is true of all KVM-based virtualization), so if you spike up your CPU you can easily "starve" your I/O threads or vice versa.
As to your DNS question, I'll have to look into that. But where are you trying to communicate? (I mean clearly you found me, but I mean where else)
--- /dev/sda1 (device 20.0 GiB) ioping statistics --- 13 requests completed in 12.5 s, 161 iops, 647.9 KiB/s min/avg/max/mdev = 213 us / 6.2 ms / 18.2 ms / 6.0 ms
This is pretty bad, everything on AWS is under a millisecond.
I submit feedback through the feedback links in the panel and on the product forums. Since you folks don't offer any other way of communicating.