I have noticed a decrease in corrected 1099s, and it is directly related to the 1099s being issued later. Now that it is mid-March, the odds of a corrected 1099 are decreasing. I have received a corrected 1099 in mid-March. All non-zero entries were the same. Apparently, they didn't check if a corrected 1099 was required, and just issued them to everyone.