Might have to do with not being there when the Beatles came to be. It was just so different then what we had had up until them. Look at the proceeding Top 20 lists before the Beatles hit the USA.
1960
1. Cathy's Clown, Everly Brothers
2. He'll Have To Go, Jim Reeves
3. Theme From "A Summer Place", Percy Faith
4. It's Now Or Never, Elvis Presley
5. Teen Angel, Mark Dinning
6. I'm Sorry, Brenda Lee
7. Running Bear, Johnny Preston
8. Handy Man, Jimmy Jones
9. Stuck On You, Elvis Presley
10. The Twist, Chubby Checker
11. Everybody's Somebody's Fool, Connie Francis
12. Alley-oop, Hollywood Argyles
13. Greenfields, Brothers Four
14. What In The World's Come Over You, Jack Scott
15. El Paso, Marty Robbins
16. Weld One, Bobby Rydell
17. My Heart Has A Mind Of Its Own, Connie Francis
18. Sweet Nothin's, Brenda Lee
19. Only The Lonely, Roy Orbison
20. Itsy Bitsy Teenie Weenie Yellow Polkadot Bikini, Brian Hyland
1961
1. I Fall To Pieces, Patsy Cline
2. Tossin' And Turnin', Bobby Lewis
3. Michael, Highwaymen
4. Cryin', Roy Orbison
5. Runaway, Del Shannon
6. My True Story, Jive Five
7. Running Scared, Roy Orbison
8. Wheels, String-a-longs
9. Raindrops, Dee Clark
10. Wooden Heart (Muss I Denn), Joe Dowell
11. Exodus, Ferrante & Teicher
12. Take Good Care Of My Baby, Bobby Vee
13. Pony Time, Chubby Checker
14. Dedicated To The One I Love, The Shirelles
15. Last Night, Mar-keys
16. Sad Movies (Make Me Cry), Sue Thompson
17. Calcutta, Lawrence Welk
18. Where The Boys Are, Connie Francis
19. Hit The Road Jack, Ray Charles
20. (Will You Love Me) Tomorrow, Shirelles
1962
1. Roses Are Red, Bobby Vinton
2. I Can't Stop Loving You, Ray Charles
3. The Twist, Chubby Checker
4. Stranger On The Shore, Mr. Acker Bilk
5. The Stripper, David Rose
6. Johnny Angel, Shelley Fabares
7. The Loco-Motion, Little Eva
8. Breaking Up Is Hard To Do, Neil Sedaka
9. Mashed Potato Time, Dee Dee Sharp
10. Soldier Boy, Shirelles
11. Hey! Baby, Bruce Channel
12. The Wanderer, Dion
13. Duke Of Earl, Gene Chandler
14. Good Luck Charm, Elvis Presley
15. Let Me In, Sensations
16. Wolverton Mountain, Claude King
17. Slow Twistin', Chubby Checker
18. It Keeps Right On A-hurtin', Johnny Tillotson
19. The One Who Really Loves You, Mary Wells
20. Palisades Park, Freddy Cannon
1963
1. Surfin' U.S.A., Beach Boys
2. Sugar Shack, Jimmy Gilmer & The Fireballs
3. The End Of The World, Skeeter Davis
4. Rhythm Of The Rain, Cascades
5. Hey Paula, Paul & Paula
6. Blue Velvet, Bobby Vinton
7. He's So Fine, Chiffons
8. Fingertips II, Little Stevie Wonder
9. Washington Square, Village Stompers
10. So Much In Love, Tymes
11. Can't Get Used To Losing You, Andy Williams
12. My Boyfriend's Back, Angels
13. Sukiyaki, Kyu Sakamoto
14. She's A Fool, Lesley Gore
15. It's All Right, Impressions
16. Puff (The Magic Dragon), Peter, Paul & Mary
17. Blowin' In The Wind, Peter, Paul & Mary
18. Wipe Out, The Surfaris
19. Deep Purple, Nino Tempo & April Stevens
20. I'm Leaving It Up To You, Dale & Grace