That is a -17° stem though, isn't it? Looks like you won't need as many spacers with a standard -6° stem. I have a Scott Speedster with a somewhat similar cable routing method, and while it may look bad for the cables, I really didn't have any problems with that over the course of 15000 kms and two years.
Edit: OK, looking closer at this, the Speedster setup is pretty much like the Ritchey Switch system, and yes, it has provisions for larger bending angle compared to the cap with holes... so it's really not the same.