Fair play to the lad. Be interesting to see if he can sustain a consistent goalscoring record throughout the season and beyond. History is littered with English strikers who have a one off wonder season before fading away into mediocrity. (See Andy Johnson, James Beattie, Rickie Lambert, Charlie Austin, Grant Holt, Alan Smith etc.)
To be fair Charlie Austin isn't a one off. His goal scoring record at every level has been pretty phenomenal since 2008. His lack of movement to a PL club seems to be the product of questions about his injury history and QPR being unwilling to budge on price. If Austin would have handed in a transfer request, or QPR would have altered their parameters in the summer, it's likely he'd be playing in the PL now.
His league record since 2008/09
2008/09 - Poole - Games 34 Goals 34
2009/10 - Poole/Swindon - Games 41 Goals 33
2010/11 - Swindon/Burnley - Games 25 Goals 12
2011/12 - Burnley - Games 41 Goals 16
2012/13 - Burnley - Games 37 Goals 25
2013/14 - QPR - Games 31 Goals 17
2014/15 - QPR - Games 35 Goals 18
2015/16 - QPR - Games 9 Goals 7
I think in Vardy's case, last season showed he was an incredibly hard worker, but he went missing for stretches after a bright start. Ranieri is a far better tactician than Pearson. It's really a case of right manager, right time. They've also been aided by a pretty fortunate start with plenty of games early on against struggling sides