Nope. OTB ratings for slow-play in most federations (e.g. USCF) require a time control of at-least G/30 (with or without a 5-second delay)
Anything faster is considered exclusively quick time control. Not sure but guessing ELO/FIDE or even BCF would want even longer games?
Also : Actually playing OTB in rated tournaments is the only CORRECT way to figure out your comparable OTB skill.
A lot of factors come to play at tournament chess that online/live chess cannot possibly map apples-to-apples to. The correlation might be there, but it is fuzzy at best (though good OTB players do just as well online if not better!)
Hi all
I dont have a OTB rating but would playing standard live chess 15/10 on chess.com give you a good ball park figure of your OTB rating