I can certainly appreciate Google's stance on the subject. I've been saying for years its reprehensible how Facebook acts as a one way silo for personal information. They've gotten a bit better about it but only after getting raked over the preverbal coals for months and months.
Frankly I don't trust Facebook as far as I can throw them which at their current size is close to nothing. Facebook has demonstrated time and time again that their focus is not on protecting users and providing value to the web. In fact quite the opposite, to move towards a AOLy version of the web where Facebook is the web. They're only as "open" as much as it benefits them, ie reduced PR exposure or added page views or users.
However, this comparison is not an apples to apples. It is my understanding (and I could be wrong or things could have changed as they do on almost a daily basis at Facebook) that when you "import" friends from Google (or any other service) that Facebook is simply providing a matching service and only adding friends if they exist on Facebook. They are not acting as a contact list provider in the sense that I can not import my dogs website nor change my friends phone number if I like to use his home number instead of his cell number for his main number etc.
Although it could be agreed that with all your friends on Facebook they are by default playing the roll of contact list and are not being fairly bi-directional. Facebook wants you messaging your friends within the confines of the system (more page views, more lock in, more details they can scrape about you) and is the main reason why they don't want you exporting your contacts.
