Surely!
At first I shared that thought too, but when I started studying about this all started to make sense.
The first Ironclads were so heavy that they couldn't put a speed near a Sailing Ship. Actually the Ironclad Gunboats couldn't even sail the ocean (so in the beggining of the XIXth century we developed ships that had a penalty won in the XIVth century).
But it didn't take long to Steamships to become faster then Sailing Ships (in the beggining they put both together, making the Steam Frigates, and then with the advancements on propulsion they could finally cast aside the sails)
Exactly. The early steam ships are slow and ungainly, but they do have the advantage of ignoring the extra movement costs for ocean terrain. Then they start getting faster once the technology matures.