Unusually high dice rolls?

Hey there everyone I know this is an odd one and perhaps one that could easily be chalked up to random chance. However, I thought it at least worth asking. Has the dice rolling algorithm been changed recently? As I have played 5 games in the past week and each one is averaging around 7 "natural 20" rolls, with well under 100 dice rolls a session. It could just be my conspiracy hat on but it seems much higher than it was a few months ago. I understand random chance and that every role in a 100 could potentially be 20 but it just seems a little high. Probably nothing but if the algorithm has been changed recently it may be worth looking into. 

This comes up from time to time and there are some great discussions about it out there. The short version of which boils down to: Roll a d20 a million times and see how many times several 20's come up in each 100 grouping of rolls. The digital dice are actually more random than physical dice, we are just programmed as humans to spot patterns and ignore the things that don't fit what our current expectations are.