In the Uk Market Revit seems to have gained the upper hand over Bentley Architecture. A probable reason for this is that Microstation products generally tend to be used for larger multidisciplinary projects and less so on smaller schemes whereas Autodesk products seem to be more commonly used by smaller practices and is not
so commonly used on large infrastructural projects

I have moved this post from the Forum to the Blogs as suggested. I am glad that the statistics mentioned above seem agreeable. I have arrived at them by talking with employers such as designers and constructors, employment agencies and employees, looking at job billboards, compiling information from CAD vendors about what bundles they sell and to whom and also from a considerable amount of time working in the field. Please feel free to share any alternative views if there are any.