"Hundreds of millions of us"
"Hundreds" would be more accurate than "hundreds of millions."
No. Hundreds of millions in China, Brazil, Korea, across many Western countries . . . Africa . . . and surprising numbers even in Islamic countries through vivid dreams, visions, visitations of Jesus The Christ to individuals, families, tribes.
The Pentecostal/Charismatic flavor & perspective of Christianity is massively sweeping across the globe. People are finding God IS REAL; DOES CARE; and DOES BACK UP HIS WORD WITH SIGNS FOLLOWING THOSE WHO BELIEVE as Scripture says.
I don't know that it's greatly more than 200,000,000 but I'm rather confident the numbers are that high. China may well be in significant excess of 100,000,000 alone.