The only problem I have with these inquiries is that often users want google to skew towards their products. If people search 'email' or 'mail', what is the pro

The only problem I have with these inquiries is that often users want google to skew towards their products. If people search 'email' or 'mail', what is the probability they are an existing customer clicking on gmail in the results? Is that really skewed if thats what people want?