Its Not True

E|-------------------------------------------------------| 
B|---------------4------------------------8--------------| 
G|--------5-------------5-----------7-----------7--------| 
D|-----6-----6------6-----------8------8-----8-----------| 
A|--4-----------------------6----------------------------| 
E|-------------------------------------------------------| 

E|-------------------------------------------------------| 
B|----------------9----------------------------4---------| 
G|---------10-----------10-------------5---7----------5--| 
D|-----10-----10----10------10-------6------------6------| 
A|--8----------------------------------------------------| 
E|-----------------------------------4-------------------| 

tuning
E|------------------------------------------------------|                        
B|------------------------------------------------------|                        
G|-------------------------------------------------| <---| tune down 1 step to F 
D|------------------------------------------------------|                        
A|------------------------------------------------------|                        
E|------------------------------------------------------|