Agree about the lag. The current reporting period is (presumably) 3/1-3/29, but the only way I can get the reported traffic to add up is to include traffic back to 2/27 which (last I checked) came before 3/1. Plus, as of 3/29, AT&T has no detail from 3/25 onward. If that holds true at the end of the month, the reported usage won't help a whole lot.
Pretty tough to manage to "not exceed" 150GB of traffic when (on a 6 megabit connection) you could in theory consume 50GB of traffic in just those 4 missing days. (55+ GB, counting ATM and PPPoE overhead....)
Of course, AT&T doesn't *want* you to be able to manage your own Internet usage, what they want to do is to either scare you into non-utilization, or to charge you extra (note that overages are billed in chunks, as in $10 for each additional .0001 to 50 GB, instead of $1 for each additional .0001 to 5 GB). If you're a "heavy user", best to let you go over by a half-gig and ding you for another $10, eh?
One thing this whole experience has taught me -- no reason to pay for faster Internet access if all that will happen is that you'll hit your caps faster. You folks on 6mbit AT&T DSL -- why not use this change in contract to fall back to 3mbit and save quite a bit each month?
One thing this has done is to convince me to look at Cox again. I left Cox for AT&T when Cox pricing and plans went unrealistic, but now they are starting to offer tiers that compete with AT&T on price while still (at least on paper) beating them on performance. Just need to see what traffic caps are in place...