I've never had a problem with them properly installed, tied on around (not through) the string. The reason for this is so you can adjust them and fine-tune--one of the main reasons I prefer rubber whiskers over most other types that are not adjustable once installed.
Never had any fly apart either--they have always lasted as long as the string for me.
As for the TB article...can't believe everything you read. The length, weight, and positioning of ANY silencer will make a difference in how it works, and how it affects performance. Comparing apples to apples, there will be no greater performance loss with whiskers vs. any other, and they work better than most for me.
Chad