If a chinese has a foreign friend and is able to communicate with you in English, then he/she is no where near average. He/she is probably an average among the middle or upper middle class, but definitely not an average among all chinese. However the bigger problem in China is not that they don't know how to bypass the firewall but that most people simply don't have the motivation to do so even if they know. The chinese version (copycat) like Baidu(google), Weibo(twitter) or youku (youtube) etc is simply good enough or better for them.