Absolutely. It's also true the other way - you don't have to use ActiveRecord with Rails, or the native ORM with Django, etc.
Of course, we already know that these benchmarks don't really have any parity, but they're interesting at a very high level as long as you understand why one might be faster.
PS: A more complex test would be nice, though - at a cursory glance, Django's ORM doesn't appear to be as slow as it used to be/is often attributed to be.
When building a company it's also good to choose something your team-members know and you can recruit for.
For that same reason, I think metrics on how much RAM they settle in at would also be interesting. They could disqualify some frameworks from RAM-constrained requirements right away (ex. if you're building some hardware with an embedded-but-sophisticated web ui).
Things like that always remind me of this great quote by Tom Lane (source: http://en.wikipedia.org/wiki/Tom_Lane_%28computer_scientist%...):