Robert - I have done just that with some vintage Rinso Blue I found a while ago. Since it was wrapped in plastic, it still had some of the original fragrance - I had forgotten how unusual it was. I could not get over the results and I think I follow pretty stringent washing practices so my wash is pretty remarkable (as immodest as that may sound). Of course NO powdery residue either. I will say that I find less residue with the Fab and Fresh Start powders, more with Surf and a moderate amount with Tide and Gain. What I have taken to doing is adding some Calgon or STPP to the first warm rinse and then rinsing again - seems to cut down on the residue. I could just go to liquids, but I am not a liquid kind of guy.
Funny observation. My local Shaw's has the new Tide Coldwater on sale this week ($4.88 for the 100 oz liquid). After church last night, I stopped there and guess what was in everyones' cart? Yup...the shelves were almost bare of that version of Tide and people were snapping it up. I asked the manager about it and he told me he had already replenished all the shelf stock three times that day and had no more left. Lots of regular Tide on the shelves though. And for those who want the TideHE Free liquid, I finally saw it at Shaw's so perhaps it has finally gone national.
For those of us who like Bold powder ( I do love the fragrance and it does a fairly creditable job) Shaw's has told me it has been officially discontinued - I will have to check this out with P&G this week...
And finally, looks like Wisk Free & Clear is back on the shelves - was discontinued for a while.