Fungus . . . or something more?

Accepting the fungus as a legitimate story, I note the AP wire describes it
 as a single organism because it is genetically uniform from end to end. The
 story expands to point out that it is composed of millions of
 connected by still more millions of underground fibrils.
 Now, if we assume that each mushroom can have distinct on/off states
 (certainly a mushroom is at least as complex as a neuron) and that the
 fibrils can communicate that state (ion pumps? electric depolarization?),
 why then, gasp!, it might be . . .
 10+K years old and ca. 100 tons vs. poisoned ecosphere and eons of mutual
 slaughter -- you tell me which might be more realistically described as