First of all tj, there's no need to insult people. Ignorant people do that when challenged.
Wait... maybe that explains it.
Anyway.
You're an ignoramus - the following quote is taken from your so called 'source':
Do you feel that either pull-ups or push-ups are a significant exercise to enhance muscle size in the arms?
The problem with using just push-ups and pull-ups for upper body training will arise as your strength plateaus. With any exercise, whether you're using your own body weight, free weights or machines, if the resistance doesn't increase, your muscles won't be overloaded and the stimulus these fibers need to grow in size will be missing.
Brilliant, Einstein. You've just introduced as supporting evidence a document which completely contradicts your argument.
If you can do more than 8 pushups consecutively you aren't placing sufficient stress on your arms to facilitate growth - any pushups you do beyond 8 is simply lactate tolerance training.
Yes, back in the paras PT consisted of little more than pushups, heaves, crunches and running. Yes, some of us put on a little muscles on the shoulders - most of that was due to heaves and the enormous amounts of food we ate.
What this routine developed far more than strength was endurance, a vital elemant for any infantry unit.
So keep doing your pushups to improve your biceps tj (LMAO) and let us know your results.
And before you embarass yourself any further, read my sticky post, learn some grammar, do some research, and when giving advice on a topic as important as health & fitness, try and speak from a background of knowledge and experience rather than speculation and hearsay.