Correct. They are working on pinpointing with more accuracy what is a truly safe level as well as making the long term longer but then, this can be said of anything dietary nowadays, right? I mean, lots and lots of things we thought we knew about are turning up that we did not so all we can do is keep on trying -which is what the USDA is doing. I mean, if one goes by what is best, one would have to become an expert nutritionist, eat only what one can grow on soil that is perfectly 'clean' (impossible in USA!), raise and butcher our own animals, etc. But, as this is impossible for most of us, we need to play the hand that is dealt to us and find the practical mediam... what else can we do? Aside from this, for all we know, we were consuming much higher levels of arsenic before the test results came out!
Now, the point I am trying to make is that, in reality, the results were not really as bad as the media made them appeared to be. Let's see if I can put this into a perspective that it's easier to understand by giving you actual figures. The strictest and lowest levels considered safe for human consumption are for water and they are 10 micrograms per liter (food levels are actually higher and, in underdeveloped nations -believe or not! they use up 130 micrograms per day per adult

). Now, the USDA found levels of 3.5 to 6.7 micrograms per cup of rice (which is, I would say, pretty much what an adult would consume a day, right?) These levels can be reduced by 30% if you rinse the rice under running water and cook it in a lot of water draining it afterward so we are now down to, approximately, 1.2 to 2.2 micrograms per cup of rice. Plus, my gloop is not all rice, it has just as much wheat, barley, oats and kamut and I certainly do not eat rice every day so this brings the actual consumed levels further down. Furthermore, (and I am quoting from an EPA report) "the EPA estimated that rice contributes 17 percent of dietary exposure to inorganic arsenic,
which would put it in third place, behind fruits and fruit juices at 18 percent, and vegetables at 24 percent. ... a more complete study by the European Food Safety Authority found cereal products could account for more than half of dietary exposure to inorganic arsenic". Not that the last part matters because I don't feed any human cereals to my birds but there are lots and lots of people who still feed cheerios and such to their birds so I figured I would mention this, too.
So, in conclusion, when it comes to arsenic exposure, to play it 100% safe, we would have to eliminate rice, fruits and vegetables and, if we did, what would we feed our birds?! See what I mean? This is what I was talking about when I say that one needs to find a practical median for these things because, as much as one would want to make everything completely and 100% safe, you can't!