I see a lot of comparison of device makers, with regards to privacy, in this thread. I think this is a moot point, in that data is collected regardless of what company, service, device is used. The fact that the data is being collected is key; your anonymity is compromised regardless. Google is an easy target due to their size and market share, but many people here work for tech companies of all sizes. Reflect on what data that company collects, how it is leveraged, and if the semantics is much different. Collect, leverage, repeat.