Maybe I'm reading this wrong but your title reminds me of a typical NY Times title talking about conservatives (sorry, had to throw politics in, t'is the season :) )
Anyway, the blog says they claim that they can do it via a methodology, not that they have actually done it and have referenceable end users to talk about it.
When MAS500 first came out (Acuity) we installed the 2nd customer on the product ever in 2 weeks. But it was only GL & AP (That's all they had available at the time).
The issue with these 'rapid implementation methodologies' and I don't think there is a single publisher who doesn't claim to have one and use it as a pitch primarily to sell more software (which is all the publisher cares about, they don't profit from you making the overall project more expensive) is that you basically have to use their generic COA, accept all the generic out of the box reports & views, are 100% responsible to clean and put your data into perfectly aligned spreadsheets (many 'methodologies' don't even allow for data conversion. They cut the corner by claiming you can just enter new records as you go)
There is zero business process re-engineering (the most important part of a new ERP solution), zero customization to the software (you better be a real plain vanilla business), no third parties, and the assumption that the client drops all other responsibilities for 35 days and does nothing but work on this.
Hence you will find it VERY hard locating actual success stories (beyond the brother in law of an executive of the publisher) of this approach.
Goes back to the ol' 'you get what you pay for'