Yes, and that just makes it more difficult. Double-XP is pretty useless to start Romulans on, because all those crap tutorial missions are unskippable except for the very first Virinat tutorial, you can't just acquire XP elsewhere and skip straight to picking a side.
You can't do Foundry missions until after you've chosen your allied faction, because the Foundry still doesn't support making missions specifically for Romulan toons. Now, that hasn't stopped authors (myself included) from making missions designed for Romulan toons, but for publishing purposes they still have to be designated as either Starfleet or Klingon missions, and identified in the mission description as being designed for Romulans. (This is as aggravating to authors as it is to players, as we have to make two versions of the same mission in order to reach Romulan players of both allied factions.)