"If, on the other hand, you or your child accidentally step on aluminum poles, you've got Instant Kaka. "

I disagree with this assessment of aluminum poles. While it may be true that stepping on them can ruin them, they are easily repaired by replacing a section or by using a sleeve to cover the damaged part. Many tents come with a sleeve for that very purpose.

Fiberglass, on the other hand, once it splinters, is virtually unrepairable. There are good reasons high quality tents use aluminum poles.