Practical reasoning, however, should go in the following direction — count the number of games where red rush decided the outcome. And by "decided the outcome," I mean it allowed the red player to salvage a losing position.
On HeroesWorld, red rush is banned almost everywhere, so you have to look at games from other sites or tournaments where it is allowed. For example, the current tournament on Diamond — a very contact-heavy L-shaped template.
I skimmed through the reports and found only one report mentioning red rush:
herolwy (red, barb, Dessa, Dessa) def ~no1_knows_me~ (blue, castle, Valeska, Ivor) diamond 211
Here, blue was red-rushed twice — first on 121, then on 211. The impact of growth on these fights is not mentioned, nor is an overall assessment of the situation.
But let's assume it played a role.
In the remaining 49 games, red rush either did not occur or was not mentioned in the reports.
Besides, the overall color balance is 26-23 in favor of blue.