Twitter – Search only through tweets of people I’m following

I would say yes you do receive them all.

Certain replies unless you follow both users are not able to be seen.

Cases for replies and mentions :

1. Your account is protected mentions sent to people who aren't following you will not be seen.
2. You will only see replies in your home time line if you are following both the sender and recipient of the tweet
3. You will see mentions not replies in your timeline as long as you are following the sender

Even during the heaviest traffic times in World Cup I was able to see all the user tweets. The home timeline only receives 20 tweets without the refresh using the more button or the "N new tweets" message. That way it might seem to someone that they are not receiving all the tweets.

For example if X users > 20 posted at 2:30 pm during a World Cup game , it would appear to you that person Y's tweet is missing. It is there , it is just that the timeline only displays 20.

To verify this , you can test with the following tabs open on your browser.

• http://twitter.com/home
• http://snapbird.org/ (Search your friends' tweets and blank for the search term)
• http://api.twitter.com/1/statuses/home_timeline.xml (Inspect in web developer mode using your firefox or chrome browser)

Looking at these three will tell you that you are in fact getting all your tweets.

Edit

If you inspect a user's timeline and are sure that it does not match up with the three above then I would suggest to check http://status.twitter.com/ to see the current status of any errors that are occurring site-wide.

If you think it is more localized you can submit a Twicket : http://help.twitter.com/requests/new

Think your Twicket is taking too long shoot a mention to @delbius the lead on Twitter's Trust and Safety team.

You may need to check your settings on both services to make sure you have chosen the correct time-zone. If you're in a country that doesn't observe DST, make sure you select the correct time-zone or un-tick the box to adjust for DST. I honestly don't use Facebook or Twitter (I'm a bit of a paranoid security geek), but I do know that Facebook won't let you change your time-zone after your account is set (Facebook Help Centre). And Twitter, on the flip-side does "hours ago..." rather than a specific date/time. There might be an account-setting that adjusts that to your local time-zone, but that's up to you to look for.