I have seen similar cabling to some of those pics, one customer suite in Telehouse was particarly bad as was a major banks data centre in The City.
We also had one customer who spent over £10k to cable their suite to a very neat standard then made their local tech redundant.They then just used contractors when needed and the place is a total mess now.
If anyone has ever been to Telehouse in Docklands then you know how bad the risers and underfloors are, in some places the floor tiles dont go level due to the amount of cables underfloor.