Not even most. I went to the Utube channel of videos of "bad preachers." I counted 30 videos. 30 our of over 10,000 IFB church just in the US.
Now, granted, not all church video their sermons. And not all that do share those videos with the rest of the world.
But still, 3/10ths of 1 percent, even taking into consideration of the above, it nothing more than a tiny fringe.
Dr. Clearwaters, President of the Seminary I attended and Pastor of Fourth Baptist Church in Minneapolis (one of the first "mega churches") used to say about experiences church splits: "I never had a church split. It was like splitting firewood for the old cook stove when I was a boy. Sometimes I would miss the log and just catch a little sap and bark. I never had a church split, just lost a little sap and bark."
What you are talking about is the sap and bark of IFB.
When you really look into IFB you will note the vast majority are not as you describe.
BWA
BFA
ARBC
GARBC
IBI
FBF
NTAIBC
WBF
ABA
ARBCA
BGC
BMA
IBFI
MBA
IBC
SBF
And those are just off the top of my head. And none of them reflect the Hyles type of IFBx.