VA Claim accepted in less than 24hrs?

Yesterday I received a Sleep Apnea NEXUS letter from my VA physician and submitted a supplemental claim. Today I look at myVA and it shows the Sleep Apnea at 50%, backdated to when I retired, and a total of 100%. (I was at 90%)

Is this too good to be true?

https://preview.redd.it/h7u8g2dbtzmf1.png?width=551&format=png&auto=webp&s=fdf71438f4a77641af1cb490445c00d764a595a8