Google's 1Q11 earnings of $8.08 slightly missed expectations, leading to a revised price target of $650, down from $700, while maintaining an 'outperform' rating. The company experienced higher operating expenses, particularly in R&D and sales, affecting margins, and management highlighted solid growth in the mobile sector despite the lack of guidance. Additionally, increased competition and the success of mobile will be pivotal for future growth, amidst potential risks that could impact their advertising revenue.