I work at Google. We don't typically monitor HN, reddit, twitter, etc but we have plenty of people watching Stack Overflow (the one we direct people to from our docs). The default quotas are conservative during this Beta period but we're happy to increase when needed--the service is certainly not provisioned as high as IMAP at this point. Submitting the quota increase request (from the developers console) will send us an email and we'll either approve it or if we need to, we'll start an email thread to ask for more info/suggest improvements. Hope that helps!