Difference between blitz and longer time controls.

I recently switched from 10 minute blitz to 15|10. Although I originally had the same rating in each before switching to blitz exclusively, my 15|10 has been rapidly increasing. What is the standard rating difference between 10 min blitz to 15|10? 

about 200 i think . my standard is about 1600 and blitz 5m 13xx . although which one you play more is going to make a difference .

I play blitz more but at these lower levels the difference is incredible!

Mine is close to 200 too. I dont really know because I can lose and gain between 50-20 ppints. I dont know why Im like this

also you have to consider that 5m blitz is different to 10m

Thats very normal 

I think  it has to do with the fact that people play more blitz than anything here. I've read that over time the glicko rating system deflates but I am not 100% sure .