OK, I'll buy that; Wiki is what it is and it isn't much.
I did do a comparo on the Federal and Winchester Ammunition Ballistics sites. Now, I realize we're not getting into handloads here but for "off the shelf" performance, the .40 and the .45 are in the same realm for energy and better than the 9mm.
I compared HydraShoks, .40 in 165 and 180, .45 in 230 and 9mm in 124 (115 in Win, they have now 124's) and 147. There's a bunch of writing that the 9mm/147 is a crap combo that has feed and other problems but I tossed it in as the heavy bullet example.
Here's the list, with the Federal number first, Winchester second.
Muzzle energies (and face it, most of these when used as intended won't be that far from the muzzle):
.45/230 = F 404 * W 396
.40/180 = F 400 * W 408
.40/165 = F 352 * W 468
9mm/147 = F 326 * W 320
9mm/124 = F 345 * W 115 gr = 383
Again, it's not handloads but it's clear that the .40 and .45 are pretty close in energy in the commercially available stuff that most people probably use. Just about all CCH instructors I have discussed this with says that for legal reasons you're better off using commercial ammunition in case it ever goes to trial for some reason.
I'm not saying muzzle energy is the be all - end all either. But it's something to use when considering penetration, along with bullet type, brand within bullet type, caliber, etc., etc., etc..
I'm still a .45 afficianado but I no longer view the .40 as "short & weak", the nickname it got when they downsized the 10mm. It's decent and likely better than a 9mm.
I own them all, btw, so I really don't have a dog in the fight. I just prefer the look, feel and whoomp of the .45 in a 1911.