5 days late, so hopefully someone answers -- If you run your web stack on Heroku, and your database in another provider, doesn't that introduce a ton of latency

5 days late, so hopefully someone answers -- If you run your web stack on Heroku, and your database in another provider, doesn't that introduce a ton of latency for your DB queries? I thought that you should strive to host in the same datacenter to minimize the latency.