I'm happy to confirm that, as an update to Joseph's post, all newly purchased certificates are now using the SHA-256, one of the algorithms in the SHA-2 set of hashing algorithms.

Furthermore, if you purchased a wildcard certificate after April 2014, it's likely your certificate is already signed with SHA-2.

If you want to learn more about SHA-1 vs SHA-2 SSL certificates, whether you should care or not, please read the SHA-2 SSL certificates article on our support site.

If you have any questions about this change, please contact us.