I guess I am going by consistency and numbers. Sure, he is slow now, but he catches a lot of balls, stays healthy, and has a strong presence on the field.
Sammy is certainly faster, younger, has great potential and so forth (which is why I wrote "Boldin might be the best"), but hasn't played drastically better, and maybe only slightly better, than the 35-37 year old Boldin.
Boldin is better than all the other WRs on our roster. That I can say with confidence. So, it's Sammy or Boldin.
Maybe I should reword it to: Boldin might be the most productive receiver on the team.
Prime Boldin is astronomically better than Sammy. No competition. No argument. Stats and intangibles support that. General football knowledge on that one.
Of course, TT/Orton/Manuel vs. Warner/Flacco/Stafford makes a difference. But keep in mind, Boldin caught 100 balls with Jeff Blake as the QB in his rookie season. Jeff Blake.