Moscow to St Petersburg 18ms, to Yekaterinburg 35ms, to Novosibirsk 50ms, to Vladivostok 110ms, to Helsinki 25ms, to Frankfurt 50ms. For CIS-facing PBXes the Moscow position is unbeatable on domestic round-trip. For mixed CIS plus EU workloads, latency to Frankfurt is still inside the toll-quality budget.
Peering at MSK-IX covers most domestic Russian carriers in a single hop. International transit is via several Tier 1 carriers with Moscow PoPs.