With the new platform, all create/edit actions take 3-4 seconds to complete. I've tried clearing cache / logging in & out, etc.
I do not seem to have this issue. Please tell me which platform you are using, as in which Browser, and which version. Also, what OS you are using them on.
I'm using Chrome 32.0.1700.77 (Stable) on Ubuntu Linux. I also just tried switching to the beta Chrome channel (v 33.0.1750.46 beta) and the same issue happens. I also disabled all chrome extensions.
The problem does not exist for me on Linux Firefox or on Mac Chrome.
Perhaps it's an issue with the latest version of Chrome, pushed on Jan 14.
Anything else that would be useful?
Unfortunately, there isn't much that can be done. We aren't able to experience this, and we have no other reports of slow downs. It appears to be a chrome issue.
As normally, any thing like this can be resolved by clearing the cache, but as you said you have tried that. It could also be the Linux version of Chrome causing issues.