You don't know that.
Yeah, could you link me a list of accounts that have been recovered over the past 10 days? Fuck me, link me to the list of accounts that have been recovered over the past 2 months. What makes you think OP's an exceptional case that his account will be recovered on a priority basis?
*Implying that verifying an ETH signed message is harder than a Bitcoin one.*
That is not even close to what it implies. Illogical, irrelevant assumption.
Why would this help him? The account is already locked. Read the thread.
Oh never knew people can deliberately "lock" their own accounts. Finally, I see some useful functionality of the broken secret question feature.
EDIT: Quoted Theymos
If you want us to recover a hacked/lost account, you need to prove that you own it. Typically, the only acceptable method of proving ownership is by signing a message (including current date and desired new email address) using a Bitcoin address or PGP key associated with the account. A Bitcoin address or PGP key is associated with the account only if the account posted the key/address, sent it in a PM, or if it is still listed in the account's profile.
I very rarely recover accounts if you can't prove ownership as described above. There are alternative ways of proving ownership, but they take too much time.
Safe to assume signed message from an ETH address would be considered as an alternative way of proving ownership?