low ratings with high everything else

All, I am curious because I see people with 1200 blitz ratings, puzzle rush scores in the 40's and puzzle ratings of 2400. Unless the person played 1 blitz game and stopped playing blitz, How is this possible?? I have no reason to ask other than pure curiosity. If anyone has a theory-please share!   Bill

Not everybody is a kid.

I'm in my mid-60s and nearly blind. It wouldn't surprise me if my Blitz and Bullet ratings are 800 points lower than my Daily rating.

I think your question is why do people have a high puzzle rating and lower rating ...so its normal for a puzzle rating to be higher if someone is 2400 in puzzles and say 1250 rapid or blitz either 1.) Poor peice placement, lack of opening knowledge with can result in a lack of middlegame plans which limits tactical chances since the peices are not cordinating well. Or 2.) They have memorized all the puzzles cause all they do is puzzles...

Mid 60's too. Takes me about 10 seconds for my eyes to focus on each puzzle rush puzzle so I have an absolute barrier to how many I can do in 5 minutes.  What I dont see is how someone can solve 45 puzzles in 5 minutes and not be killing people in blitz. -Bill

Also, there's a big difference between puzzles (where you KNOW that a winning move exists) and games (where you only HOPE that a winning move exists). Some players have a low level of tactical alertness, and usually won't see a combination unless they KNOW it's there.

You say low and high, but you don't mention how to determine what the difference is between them. Numbers that are considered "low" and "high" are not universal to every topic. What is bigger, 3 feet or 36 inches? Even in those cases, at least there is a specific translation between feet and inches. Taking something like blitz vs puzzles, on the other hand, has no precise translation. We generally observe the number associated with one's chess.com puzzle rating is higher than their blitz rating, but we have no means of guaranteeing any exact translation between the two, at best approximations rooted from the correlations we see most. 

So one easy part of the answer is that the numbers for the puzzle ratings naturally run on higher digits than they do in blitz. Another part could also be one is done more frequently, someone may do far more puzzles than blitz games. So a player may actually have a larger than frequently seen gap between blitz and puzzles by being better at puzzles than blitz. (It can also be lower than frequently seen if they are better at blitz than puzzles).

Puzzles and blitz have different skills. You need the perfect, or at least predetermined moves set by puzzles, or you fail. Blitz grans more leeway. On the other hand you are ensured a solid answer in a puzzle, where blitz you are never told which moves require the key responses. So there are different things that may be emphasized.