I'm not clear whether filling meant the 6' to refill or the entire pool. If you were an average of 4' deep, and your average should be more than that, you have 4,000 cubic feet of volume which is 29,900 gallons....you better keep that water meter if it took you 10-1/2 hours to fill it....but I'm thinking that's not what you meant...just to refill the 4 to 6 inches !!!
Using 4.75' as an average depth the volume calculates out at 35,500 gallons. That means at 10-1/2 hours you filled at a 56-1/3 gallon per minute rate to fill in 10-1/2 hours...not likely you meant the entire pool.
On the other hand...if you meant filling the 6" took you 10-1/2 hours and was 11,500 gallons you better get that meter replaced. That was an 18.25 gallon per minute fill...that's a pretty good rate but on the upper end of delivery rates. On the other hand for the 6' volume that calculated at 3,750 gallons then the fill rate was 5.95 gallons per minute which is a reasonable number.