Conditional use based on logged-in user?

[inspire22]

Since there's a (small) delay between slave servers and master ones, when a user updates an item, I'd like to show that result from the master database.

Is there any way to enable or disable this module on a per-request basis?

Looking at the code I see Thread.current[:read_from_slave], but aren't sure that setting this to false will skip it for this request...