Both of those took a couple of hours to render - I got 3 passes within about 15 minutes or so but I let them cook to aout 25 passes each so the noise wasn't too bad! That's the downside in using montecarlo radiosity!
The longer render was actually the interior shot, because it had total internal light bounce and it was almost completelly lit by the luminous surfaces in the scene! It looks pretty but it's not the fastest or most efficient way of lighting it!
That scene doesn't have all of the model in it, and it's over 1 million polies!
ordinarily a scene like that would take a country week to render in lightwave, without agressivelly optimised lighting (I use area lights and a coloured backdrop , for the radiosity schema). The reason the lighting looks so dull is because I only need the area light set to about 40% - otherwise it overblows the scheme, with all the radiosity bounces!