Mmm, I feel you are too friendly for this very poorly organized con: everybody agrees that the website of Drupalcon Paris was really really bad and a disgrace for Drupal. Even a random DrupalCamp website generally looks, and works, better. Next to that there was lack of planning (which seems to be typical French) and lack of communication during the conference (or did you know what social events were happening every night?).

The internet connection and the buildign were very good indeed.
The location was okay, but I prefer conferences in small 'drupal-cities' like Szeged, were we didn't have to catch a metro for 30 minutes in order to find each other. This DrupalCon was in Paris because so many people voted for it because they like the city (as tourists); despite it's unfriendly people, language barriers and much too expensive infrastructure.
I, and with me most European Drupal lovers, hope the next European DrupalCon will be in a smaller city like Cologne (Germany) or Maastricht (Holland).