Though I do not tend to agree with that statement, as in general neither are particularly likeley to detonate in the real world under normally encountered circumstances, it is probably academic, as I was not refering to "High or Low" recations, but rather "high or low order" explosion damage.
Refs. NFPA 921 - 2004
sections
3.3.89;
3.3.103;
21.3;
21.3.1;
and 21.3.2*
Pat Kennedy, CFEI, CFPS, MIFireE
Fire and Explosion Analyst
Sarasota, Florida
[
www.kennedy-fire.com]