Well that's the sticky wicket isn't it -- I don't really do Architectural stuff, or at least not traditional stuff (more sci-fi/fantasy)... so I could not say what an architectural person would say for sure.
However I'm of the mindset that good modeling is good modeling, and usually when I get past the "anti-SketchUp snobbery" I encounter elsewhere I often find underneath is a solid reason for disliking SketchUp. Namely the geometry that SketchUp creates is not terribly good in many cases (sometimes the fault of the program, but often the fault of the modeler using it)... and when those users are forced to deal with SketchUp made geometry in other apps it is frustrating (to say the least). The same complaints are often made about Revit, but since I don't know anything about that software I cannot confirm.
Now to be fair it IS called "SketchUp", and one would think the choice of name is purposely telling you that this is meant more for "Sketches", rather than high-end models (and results often bear that out).
I'm not into undermining this forum with talking too much about specific competing products, but I will say that after spending considerable time with the latest version of form.Z I found it to be much more powerful than SketchUp Pro, even with a slew of free and paid plugins... it is often used for architectural work, and the price is not far off from Pro.
My reservations about that software really came down to some odd UI things I wanted sorted out before I tried to teach it -- If I was using it only for personal work I would have purchased for sure, but I didn't want to spend the first 2 hours of my course explaining how to customize the UI... I prefer to cover those topics after the student has a understanding of how to use the tools, so they can customize with their own workflow in mind, rather than blindly follow my lead. So my intention was to include some UI presets to get through the bulk of the course quickly, but they were having issues with monitors of differing resolutions on some operating systems exploding the UI (think SketchUp toolbars problem but worse).
Personally, for the work I am more likely to do, I think I would prefer Modo, but that software has some issues of it's own -- I decided to hold off there due to a relatively underdeveloped/immature API for 3rd party plugins (namely my render engine). And I didn't choose MoI (my other top choice) for the same reason (non-existent API).
My other main 3D related softwares are geared more towards organics and high-end textures . As it stands I'm am taking the "wait and see" approach with how things pan out with Trimble -- if things don't move in a direction I like I will make a switch at that time... I can say for sure that I already really hate the decision to do an Autodesk-like annual release (SketchUp 2013... lame).
Best,
Jason.