Launderess says:
"[...] It seems both HE and regular versions contain silicone as an antifoaming agent. "
Well, that, right there, shows why I have little respect for what most people on the internet say -- unlike what the majority of people say, Tide is not a "high-sudsing" detergent, and it has not been for at least a couple of decades. Sure, it suds up more than the HE versions, and it can cause trouble when overdosed even in top-loading washers.
But so can the UK version of Ariel, manufactured for use in front-loading machines, and it suds up more (even in normal dosages) than, say, German Persil. The box say it can oversuds if overdosed.
At various times, since early 1990's, when P&G felt moved to print ingredients on the boxes of Tide (instead of the general "anionic and/or non-ionic surfactants, enzymes, water softeners and processing aids"), it listed, depending on year, "suds control agents" or "suds suppressing agents". Tide has been, for a long time now, at the very least a suds-controlled detergent, if not a low-sudsing detergent (remember when Ultra Tide was introduced in the 90's?).
The difference is not so much that it has silicon as an anti-foaming agent. The difference between formulations is how much and of what kind of anti-foaming agents. If you only need suds control, particularly during the wash cycle, whatever they put on regular Tide will do. If you actually need something for HE machines, not only the kinds of surfactants change (they're naturally less foamy to begin with), but the kinds and quantities of suds-supression silicones are kicked up more than a couple of notches -- HE machines will not, as a rule, like it when the "high" sudsing detergents sudslock during the first spin for rinse. Heck, even traditional top-loaders don't like it, but most people using top-loaders don't care and don't notice badly rinsed clothes anyway.
If you want to see *high* sudsing detergents, possibly just as high-sudsing as Tide used to be, if not more, just get some stuff from South America, where anything that doesn't say "for washing machines" is supposed to be used for handwashing and will produce more than a foot or so of foam even when handwashing in a wash tub.
Even stuff that suds more than Tide (inexpensive detergents, like Trend etc) here are relatively well behaved compared to the South American stuff. I'd be willing to bet they also list silicone in their Material Safety Data Sheets.
Cheers,
-- Paulo.
[this post was last edited: 9/12/2012-01:29]