“If you can read this, I’m not impressed. Most people can read” is a jocular saying that has been printed on many bumper stickers. “If you can read this, you’re too close” or “If you can read this, thank a teacher” are more usual bumper stickers with this “If you can read this…” beginning line.
       
“If You Can Read This I’m Not Impressed. Most People Can Read” was cited in The Courier-Journal (Louisville, KY) on February 1, 2006, where the bumper sticker was credited to Scott Richter of KComposite.com.
 
   
1 February 2006, The Courier-Journal (Louisville, KY), “The Talented Mr. Richter” by Joshua Hammann, Velocity Weekly, pg. 11, col. 3:
KComposite.com
(Scott—ed.) Ritcher has posted many of his interviews online for your enjoyment. This site also links to his store, where bumper stickers like “Formerly Proud To Be An American” and “If You Can Read This I’m Not Impressed. Most People Can Read” are available for purchase.
 
Twitter
sarah
@sarah_y
We just saw a bumper sticker that said, “If you can read this… I’m not impressed. Most people can read.” Oh you clever people.
12:53 PM - 17 Jan 2009
   
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Rebecca Moss
@bexmoss
If you can read this…i’m not impressed. Most people can read.
2:08 PM - 29 Jun 2009
   
25 May 2012, The Advertiser (Adelaide, Australia), “Mouthing Off” by Marty Smith, pg. 24:
“If you can read this I’m not impressed. Most people can read.” - bumper sticker.
     
Twitter
MINI Downtown
@MINIDowntown
It’s #MINIbumperstickers Monday! Today’s bumper sticker quote is “IF YOU CAN READ THIS I’M NOT IMPRESSED, MOST PEOPLE CAN READ”
11:31 AM - 25 Feb 2013
 
25 May 2015, The Advertiser (Adelaide, Australia), “The Last Word” by Marty Smith, pg. 18:
INSIGHT “If you can read this I’m not impressed. Most people can read.” - bumper sticker.
   
Twitter
Baloo
@ZeBaloo
If you can read this, I’m not impressed. A lot of people can read. #BumperSticker
5:26 PM - 21 Oct 2016
 
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MadeunderPressure
@MAD3_pressure
If you can read this I’m not impressed. Most people can read.
5:18 PM - 10 May 2018